JP3072875B2 - Method and apparatus for correcting a workpiece having a complicated shape - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for correcting a workpiece having a complicated shape such as a turbine blade.
In particular, the present invention relates to a correction method suitable for efficiently correcting a workpiece having a complicated shape within a preset tolerance, and a correction device for performing the correction method.

[0002]

2. Description of the Related Art As a prior art for correcting a workpiece having a complicated shape such as a turbine blade, Japanese Patent Laid-Open No.
There are techniques described in JP-A-5-141328, JP-A-56-23319, and JP-A-60-210323.

In the prior art described in Japanese Patent Laid-Open No. 55-141328, the position of an arbitrary cross section of a three-dimensional object (hereinafter, referred to as "work") is measured, and these measured values are plotted on coordinates. In addition to calculating the coordinate value, the model is measured in the same manner as the work, to obtain a reference coordinate value, and the work and the model are compared with each other to calculate the deformation amount of the work. The load is applied to the work to calculate the material properties (proportional constant) of the work, and based on this proportional constant, the load is controlled so that the amount of deflection after removing the load is the same as the amount of deformation. I am trying to do it. Further, the deformation amount of the work is defined as a torsional deformation amount and a bending deformation amount in the X and Y-axis directions, and the torsional deformation amount is obtained by calculating an inclination with respect to each linear coordinate axis connecting two points of the coordinate axis of the work and the reference coordinate axis of the model. The calculated amounts of bending deformation in the X- and Y-axis directions are calculated by comparing the coordinate values of the workpiece after correcting the amount of torsional deformation with the reference coordinate values of the model.

[0004] In the prior art described in the above-mentioned Japanese Patent Application Laid-Open No. 56-23319, a face plate for rotating a blade by gripping an implanted portion of a turbine blade (hereinafter referred to as a "blade" in the section of the prior art). , A measurement support for model work that is attached to the front of this face plate and is capable of moving back and forth from the left and right of the face plate toward the center, and is also attached to the front of the face plate and can move back and forth to the center from above and below the face plate A ventral arm and a dorsal arm, which are attached to the model, a measuring device that is installed to be able to advance and retreat toward the steam path of the model work or the blade, and measures the shape of the steam path of the model work or the blade, A saddle which is provided so as to be able to advance and retreat toward the face plate, and a lug holder which is provided on the press surface of the press table and is incorporated so as to be able to advance and retreat toward the blade. And a pair of two press receiving,
The punch includes a punch provided on the opposite side of the press surface across the blade, a pressing mechanism for pressing the punch against the blade, and a torsion chuck provided on the saddle and gripping the tenon of the blade.

In the prior art disclosed in Japanese Patent Application Laid-Open No. 56-23319, the measurement support is extended to support the model work, the measuring device is brought close to the model work, and the model work is moved by the measuring device. Measure and store the value in the computer.

Then, the model work is removed, and a blade is mounted on the measurement support instead. The blade is gripped by the abdominal arm and the back arm, and the measurement support is retracted.

[0007] Thereafter, the face plate is rotated, the tenon of the blade is set in a posture that can be gripped by the torsion chuck, the saddle is advanced toward the face plate, and the tenon of the blade is gripped by the torsion chuck. In this state, rotate the face plate a further fixed angle, twist the blade, and then return it to the original angle again.
After releasing the torsional chuck, the saddle is retracted to its original position. Next, the amount of untwisting of the blade is measured, the elastic coefficient is obtained from the value, and the amount of deformation is obtained from the measured value. Next, in the case of the root bending correction of the blade, the blade is supported by the back arm and the lug receiver, the punch is operated by the pressing mechanism, and the blade is pressed to correct a required portion. In the case of intermediate bending correction of the blade,
The implant portion of the blade is sandwiched between the abdominal arm and the dorsal arm, the face plate is rotated, the tip of the blade is set to be substantially horizontal, and a pair of press receivers is applied to the back side of the blade. The correction is performed in the same manner as in the case of the root bending correction. Further, in the case of correcting the torsion of the blade, the implanted portion of the blade is gripped by the abdominal arm and the dorsal arm, while the tenon of the blade is gripped and fixed by the torsion chuck, and the face plate is rotated to correct the blade. I have to.

Further, in the prior art described in Japanese Patent Application Laid-Open No. Sho 60-210323, a control system having an arithmetic function is provided.
A first plate, a left column, a right column, and an upper garter rail; and first and second arranging blades disposed on the left and right sides and movably provided in the length direction of the blade along the garter rail, and configured to rotate the blade. 2, a first carriage movably provided in the length direction of the blade along the garter rail, a longitudinal slide supported by the first carriage, and a first carriage attached to a lower portion of the slide. , Second and third hydraulic rams, and the first, second, third
A first, a second and a third set of pressure pieces provided on the hydraulic ram, a second truck installed on the base plate and movably mounted in the front-rear direction, and the second truck A pair of a vertical slide installed on the upper part, a receiving base installed on the upper part thereof, a pressing link attached to the receiving base and attached to the blade so that the blade can be clamped, A set of slides installed and movable in the length direction of the blade, a vertical slide installed on the upper part of the slide, and an optical displacement meter mounted on the upper part and mounted so as to measure the outer shape of the blade. And a slide installed on the second bogie on the left side in the length direction of the blade and movable in the length direction of the blade, a front-rear slide installed on the top of the slide, and installed on the top of the slide Upper and lower A pair of a slide, a first receiving piece provided on the upper part of the slide, a slide installed on the second bogie on the right side in the length direction of the blade and movable in the length direction of the blade, A pair of forward and backward slides installed on the upper part of the vehicle, a vertical slide installed on the upper part thereof, a second receiving piece provided on the upper part thereof, and a second carriage mounted on the second carriage; A slide which can be moved in the length direction of the blade, a front-rear slide provided above the blade, a vertical slide provided above the blade, and a third receiving piece provided above the blade. And a pair.

In the prior art described in Japanese Patent Application Laid-Open No. Sho 60-210323, a blade, which is a workpiece, is placed on a receiving table, pressed and clamped by a pressing link, and the second carriage is used to clamp the blade. 1. The sheet is transported to a position corresponding to the front and rear direction of the second blade gripping mechanism. Next, the blade on the pedestal is moved by the first and second
Is raised to a position corresponding to the vertical direction of the blade gripping mechanism. Next, the other end in the length direction of the blade is gripped by the second blade gripping mechanism, and then the pressing link unclamps the blade, the cradle descends, and the blade is delivered to the second blade gripping mechanism. Dolly 2 retreats. Next, the blade is pressed against the positioning plate in the first blade gripping mechanism by the second blade gripping mechanism to be positioned, the blade is held by the first blade gripping mechanism, and the second blade gripping mechanism is returned. Then
The optical displacement meter is moved to the position of the blade by the second bogie, the outer shape of the blade is measured by the optical displacement meter, and the measurement result is sent to the control system, and the type of distortion of the blade,
The degree is calculated and an operation command is sent to each part of the device. In order to correct the warpage of the blade, the first and second receiving pieces are moved to positions corresponding to the blades by the second carriage, and the blades are supported by the first and second receiving pieces. , First
The first pressure piece is moved to a position corresponding to the blade by the cart, and the first pressure piece is lowered by the hydraulic ram to press the blade and correct the warp distortion. After the correction, the outer shape is measured again by the optical displacement meter, the correction amount is calculated, and when the correction needs to be performed again, the above-described correction process is repeatedly performed. Next, when correcting torsional distortion, a predetermined position of the blade is fixed between the first receiving piece or the second receiving piece and the first pressing piece, and the blade is held by the second blade gripping mechanism. The twisting position is gripped, and the second blade gripping mechanism is rotated in the blade twist correction direction. Even after this torsion correction, the outer shape of the blade is measured, the amount of correction is calculated, and if it is necessary to correct again, the above-described correction process is repeated. When correcting the opening distortion, the blade is supported by the third receiving piece, and the blade is pressed by the second pressing piece. It is supported by a receiving piece, and the blade is pressed by a third pressing piece or a second pressing piece.
After the correction of the opening distortion and the dent distortion, the outer shape of the blade is measured, the amount of correction is calculated, and when it is necessary to correct the blade again, the above-described correction process is repeated.

[0010]

However, all of the above-mentioned prior arts need to repeatedly perform a series of steps including measurement of the outer shape of the workpiece, correction of the pressure or torsion, and determination of the correction amount. Is bad,
There was also a problem that it was easy to overcorrect.

SUMMARY OF THE INVENTION It is an object of the present invention to automatically and efficiently correct even a relatively long workpiece having a three-dimensionally asymmetric cross section, such as a turbine blade, which can be corrected so as not to be overcorrected. An object of the present invention is to provide a method of correcting a workpiece having a shape.

Another object of the present invention is to provide a device for correcting a workpiece having a complicated shape, which can accurately carry out the correction method.

[0013]

[0014]

[0015]

The object of the present invention is to preset a design shape which is a target value for correction, various correction patterns obtained by experiments for correcting a workpiece to the target value, and a tolerance. The shape of the workpiece before correction is measured, and a correction pattern and a first correction amount are determined from the target value and the measured value.
After the addition of modified workpiece based on BiOsamu positive amount, once removed modify force, then the plastic deformation of first amendments after the workpiece is measured, the measurement result after correction before and modifications To
In comparison, if the workpiece has not undergone plastic deformation, the correction is repeated from the second time until the workpiece is plastically deformed by the correction amount obtained by multiplying the first correction amount by the number of correction times. When plastic deformation occurs in the workpiece,
The remaining amount is calculated by subtracting the amount of plastic deformation of the workpiece from the target value of the correction, the workpiece is corrected by the correction amount obtained by adding the remaining amount to the immediately preceding correction amount, and this correction is repeatedly performed. This is achieved by modifying the shape of the workpiece to be within tolerance.

[0016]

The object is to form a frame and a workpiece.
Press the lower surface of one end of the workpiece against the reference surface during measurement.
The measuring station to be clamped and when correcting the workpiece
Lift the workpiece from the measuring station and
A clamp device is set to clamp the workpiece in its length direction, width direction and up and down direction, and a hollow that allows the workpiece to be inserted.
And is movable in the longitudinal direction of the workpiece.
The sensor mounting plate and the sensor mounting plate
Non-contact measurement of the external shape at a predetermined position in the length direction of the workpiece
A first measuring means constituted by a sensor of the type
Positioned at the end of the workpiece that is displaced corresponding to the correction
Second measuring means comprising a position recognition sensor
The measuring device obtained, a correction support die that supports the work piece at the time of correction, a correction press die that applies a correction force to the work piece to plastically deform, a torsion correction means for the work piece, and a correction target value. Various correction patterns and tolerances obtained by a certain design shape and an experiment are stored in advance, and the actual measurement values of the workpiece are captured from the measurement device, and the correction pattern and the correction amount are calculated from the target values and the measurement values. This is achieved by providing the correction support mold, the correction push mold, and the torsion correction means with a computing unit that sends a correction execution command.

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

In the method of the present invention, determine the actual correction from measurement pattern and the first correction amount of the goal value and the workpiece.
Next, a correction is made to the workpiece based on the determined correction pattern and correction amount. Then, once we removed the correction force, to measure the amount of plastic deformation first amendments after the workpiece. Then, compare the measurement results before and after the correction.
In comparison, when no plastic deformation occurs in the workpiece,
From the second time applying a positive Osamu repeatedly until plastic deformation occurs in the workpiece by the amount corrected by multiplying the number of corrections to the first correction amount. When plastic deformation occurs in the workpiece, the remaining amount is calculated by subtracting the amount of plastic deformation from the correction target value, and the workpiece is corrected by the correction amount obtained by adding the remaining amount to the immediately preceding correction amount. , Make the above correction until the shape of the workpiece is within the tolerance
Repeat .

As a result, according to the method of the present invention, the workpiece can be corrected more efficiently while preventing overcorrection.

[0027]

[0028]

[0029]

[0030]

[0031]

[0032]

[0033]

In the apparatus of the present invention, the workpiece is set on the measuring station by the clamp device. Next, the shape of the workpiece is measured by the first measuring means ,
The tip position of the workpiece is measured by the second measuring means, and
These measured values are sent to a computing unit. In the calculator, the
The correction pattern and the correction amount are determined from the actual measurement value of the workpiece sent from the first measurement means and the target value (design shape), and the correction support type and the correction press die, and the torsion correction means are determined. To send a correction execution command.

When a correction pattern to be corrected by pressing a predetermined portion of the workpiece is selected, the correction support die and the correction press die are moved to predetermined positions based on a correction execution command from the arithmetic unit. The movable support die supports the work, and the correction die presses the work in accordance with the correction amount determined by the arithmetic unit to make a correction. When a correction pattern for correcting the torsion of the workpiece is selected, one end of the workpiece is gripped and fixed by, for example, a correction support type and a constraint type based on a correction execution command from the arithmetic unit. The torsion correcting means twists the other end of the workpiece in accordance with the correction amount determined by the arithmetic unit,
Make corrections. In any case, after the correction, the shape of the workpiece is measured again by the measuring device, and the measured value is sent to the arithmetic unit. The computing unit determines a difference between the correction target value and the measured value after the correction, determines whether the difference is within the tolerance, or not. If the difference is not within the tolerance, the correction step is performed. The process is repeated to correct the shape of the workpiece so that it falls within the tolerance.

Therefore, according to the apparatus of the present invention, the method of the present invention can be accurately performed.

[0037]

[0038]

[0039]

[0040]

[0041]

[0042]

[0043]

[0044]

[0045]

[0046]

[0047]

[0048]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIGS. 1 to 18 show a first embodiment of the present invention, in which a workpiece is a turbine blade.

In the first embodiment shown in these figures, FIG.
And a frame 1 shown in FIG.

The frame 1 has a lower frame member 2
An upper frame member 3, a left side frame member 4,
It is configured by combining the right side frame member 5 with a box shape. As shown in FIG. 2, the lower frame member 2 has shoulders provided on the left and right sides of the lower frame member 2 disposed on the upper side, and the left and right side frame members 4 and 5 are provided.
It is configured to be able to receive a reaction force of a support type for correction at the time of correcting a workpiece through a coupling structure 6 in which a shoulder provided at a lower portion of the work is arranged on a lower side. As shown in FIG. 2, the upper frame member 3 has shoulders provided on the left and right sides of the upper frame member 3 on the lower side, and is provided above the left and right side frames 4 and 5. Through the connecting structure 7 in which the shoulders are arranged on the upper portion, the reaction force of the correcting press die can be received when the workpiece is corrected.

As shown in FIG. 1, an intermediate base 8 is fixed to one end of the lower frame member 2 of the frame 1 in the longitudinal direction of the workpiece. This intermediate base 8
The NC rotary table 9 is installed on the upper part of. A clamp device 10 is attached to one end face of the NC rotary table 9 so as to be capable of reversible rotation.

FIGS. 6 to 8 show the inside of the clamping device 10.
As shown in FIG.
1, 12, a positioning block 13 in a length direction, positioning blocks 15 and 16 in a width direction, and clamp jigs 19 and 20 in a vertical direction are arranged. The reference blocks 11 and 12 in the vertical direction are arranged at a predetermined distance from each other in the width direction of the workpiece, and are fixed in the clamp device 10 to flatten the root of the turbine blade as the workpiece. Surface is to be placed. The lengthwise positioning block 13 is attached to a piston rod inserted into an air cylinder 14 and is provided so as to be adjustable in position in the longitudinal direction of the workpiece. By pressing one end surface in the longitudinal direction of the workpiece, the position of the workpiece in the longitudinal direction is determined. The width direction of the positioning blocks 15 and 16 are mounted on the reference blocks 11 and 12. In addition, the positioning block 15 and 16,
Is attached to the fitting interpolated piston rod et Ashirinda 17, abuts on both sides in the width direction of the workpiece placed on the reference blocks 11 and 12, the position in the width direction of the workpiece Is decided. The vertical clamp jigs 19 and 20 include hydraulic cylinders 21 and
2 is attached to the piston rod inserted.
The reference blocks 11 and 12 and the clamp jig 1
9, the reference block 1 is used when measuring the shape of the workpiece.
A measurement station for clamping a workpiece is provided with the upper surfaces of the reference numerals 1 and 12 as reference surfaces. In addition, of the workpiece
At the time of correction , the reference jigs 10 and 20 are used to
A clamp station for clamping a workpiece above the workpieces 11 and 12 is formed.

As shown in FIGS. 1 and 2, on the upper surface of the lower frame member 2, a guide rail 23 which is long in the longitudinal direction of the workpiece at a predetermined interval in the width direction of the workpiece.
Are laid in parallel. In addition, self-propelled first and second moving tables 24 and 25 are arranged above the lower frame member 2 so as to be able to reciprocate along the guide rails 23.

A first correction support mold 29 is mounted on the upper part of the first moving table 24. This first
Has a flat upper surface, and has a root 65a of a turbine blade 65 as a workpiece.
It is formed so as to receive it. The first correction support mold 29 is attached to a piston rod inserted in a hydraulic cylinder 30 (see FIG. 9).

As shown in FIG. 1, the second moving table 25 has a lower moving portion 26, an upper guide rail 27, and an upper moving portion 28. The lower moving part 26
Is mounted so as to be movable in the longitudinal direction of the workpiece along the lower guide rail 23 in a self-propelled manner. The two upper guide rails 27 are arranged in parallel on the upper surface of the lower moving portion 26 at predetermined intervals in the longitudinal direction of the workpiece, and are installed long in the width direction of the workpiece. The upper moving portion 28 is attached so as to be movable in the width direction of the workpiece along the upper guide rail 27 in a self-propelled manner.

The upper moving part 28 of the second moving table 25
At the upper part of the table, a support base 31 for correction is installed. The mounting base 31 is provided with a hydraulic cylinder 32
(See FIGS. 9 and 10). As shown in FIG. 11, second, third, and fourth correction support dies 33, 34, and 35 are mounted on the upper surface of the mounting base 31. The second correction support die 33 has an upper surface formed in a substantially concave arc shape, and receives the back side when the root abdominal bending of the turbine blade 65 as a workpiece is corrected. The third correction support mold 34 has an upper surface formed in a substantially convex arc shape, and receives the abdominal side at the time of correcting the back side of the root portion and the back side of the tip of the turbine blade 65 as a workpiece. The fourth correction support type 35 includes:
The upper surface is formed to be flat, and receives the back side when correcting the bending of the turbine blade 65, which is the workpiece, and receives the ventral side when correcting the torsion.

Further, as shown in FIGS. 1 and 2, on one side of the second movable table 25, a support table 3 for the workpiece is provided.
6 are arranged. The support base 36 is attached to a piston rod inserted into the air cylinder 37.

As shown in FIGS. 1 and 2, on the lower surface of the upper frame member 3, an upper guide rail 38, which is long in the longitudinal direction of the workpiece, is provided at a predetermined interval in the width direction of the workpiece. Are fixed in parallel. A third movable table 39 is attached to the upper guide rail 38.

The third moving table 39 has an upper moving part 40, a lower guide rail 41, and a lower moving part 42, as shown in FIG. The upper moving part 40
Is mounted so as to be movable in the longitudinal direction of the workpiece along the upper guide rail 38 in a self-propelled manner. The two lower guide rails 41 are arranged on the lower surface of the upper moving portion 40 at predetermined intervals in the longitudinal direction of the workpiece and are arranged in parallel with each other, and are installed long in the width direction of the workpiece. The lower moving part 42 is attached so as to be movable in the width direction of the workpiece along the lower guide rail 41 in a self-propelled manner.

The lower moving part 42 of the third moving table 39
On the lower side, a mounting base 43 for a correction push die is arranged. The mounting base 43 is mounted on a piston rod inserted into a hydraulic cylinder 44 (see FIGS. 8 and 9) provided in the lower moving part 40. As shown in FIG. 11, first and second
Correction dies 45 and 46 are attached. The first correction pressing die 45 has a lower surface formed in a convex arc shape, and presses the abdomen at the time of correcting the bending of the root abdomen and the abdomen of the tip of the turbine blade 65 as a workpiece, and pushes the abdomen, When bending is corrected, the back side is pushed. The second correction pressing die 46 has a flat lower surface, and pushes the rear surface when correcting the root bending of the turbine blade 65 as a workpiece.

On one side of the lower moving part of the third moving table 39, a restraining die 47 of a torsion correcting means is arranged. As shown in FIGS. 1 and 2, the constraining die 47 is attached to a piston rod inserted into a hydraulic cylinder 48 supported by the lower moving part 42, and when the torsion of the workpiece is corrected, Support type 33 for modification 2
Thus, a predetermined portion of the workpiece is pinched and restrained.

In this embodiment of the left and right side frame members 4, 5, a guide rail 49 is mounted on the inner surface of the right side frame member 5. This guide rail 49
As shown in FIGS. 1 and 2, two are arranged in parallel at a predetermined interval in the vertical direction, and are arranged and fixed long in the longitudinal direction of the workpiece. The guide rail 49
Is mounted with a fourth moving table 52, which is connected to a driving device. This driving device has a motor 50, a screw rod 51 connected thereto, and a nut (not shown) provided in the fourth moving table 52 and screwed to the screw rod 51. . The driving device rotates the motor 50 in the forward or reverse direction to thereby rotate the screw rod 5.
The fourth movable table 52 is moved along the guide rail 49 to the forward side or the return side by the screw action of the nut 1 and the nut. A workpiece measuring device is attached to the fourth movable table 52.

As shown in FIGS. 1 and 2, the measuring device comprises: a first measuring means mounted on a sensor mounting plate 53 fixed to the fourth movable table 52; A second measuring means installed on a sensor mounting base 54 fixed to one surface. As can be seen from FIG. 3, the sensor mounting plate 53 is formed in a hollow rectangular shape so that a workpiece can be inserted therethrough, and the sensor mounting plate 53 itself can move in the longitudinal direction of the workpiece. It has become.

As shown in FIG. 3, the first measuring means includes light-emitting laser sensors 55a, 55c, 55d, and 5 mounted on one surface of the upper side of the sensor mounting plate 53.
5f, light emitting side laser sensors 55b and 55e also attached to the other surface of the upper side, and a sensor mounting plate 53
A light emitting laser sensor 55g, 55i attached to one surface of the right side of the light emitting device, a light emitting laser sensor 55h similarly attached to the other surface of the right side, and a sensor mounting plate 5
3, light-receiving laser sensors 56a, 56c, 56d, and 56f attached to one surface of the lower side, and light-receiving laser sensors 56b and 5 similarly attached to the other surface of the lower side.
6e, a light-receiving laser sensor 56g, 56i attached to one surface of the left side of the sensor mounting plate 53, and a light-receiving laser sensor 56h attached to the other surface of the left side. Further, among the light emitting side laser sensors 55a to 55i, the light emitting side laser sensors 55a, 55b, 55c, the light emitting side laser sensors 55d, 55e, 55f, and the light emitting side laser sensor 55
g, 55h, and 55i form a set. And among the light receiving side laser sensors 56a to 56i,
The light-receiving side laser sensors 56a, 56b, 56c, the light-receiving side laser sensors 56d, 56e, 56f, and the light-receiving side laser sensors 56g, 56h, 56i each constitute one set, and are opposed to the light-emitting side laser sensor set. The light emitting side laser sensors 55a and 55
b and 55c, a set of light-receiving-side laser sensors 56a, 56b, and 56c arranged as opposed to
A shape in which the laser light emitted from one set of light-emitting side laser sensors is combined so as to partially overlap, and the workpiece is a turbine blade and has an edge portion like the cross-sectional shape of the steam passage. Even when the laser beam is used, the entire area is irradiated with a laser beam so that the shape can be measured.

As the second measuring means, a position recognition sensor 57 is used. The position recognition sensor 57 is installed on the sensor mount 54 and is located at one end of the workpiece. , And photograph the shape of the workpiece. Light receiving side laser sensor 56 of the first measuring means
a to 56i and a position recognition sensor 57 as a second measuring means are connected so as to output to an arithmetic unit 58, respectively.

As shown in FIG. 2, the arithmetic unit 58 includes:
A correction target value 59, various correction patterns 60, and a correction tolerance 61 are previously input and stored. The target value 59 is a design shape and is CAD data. The modification pattern 60, which was obtained through experiments in order to fix the workpiece to the target value 59, if the workpiece is a turbine blade 65, the pattern 1-6 for example such 17 6 Kind. Further, the arithmetic unit 58, by the first, second measuring means, actual measurement values 62 and 63 of the workpiece is entered. And the arithmetic unit 58
The measured value of the workpiece with the target value 59 of the modified 62,6
3, a correction pattern to be applied and a correction amount to be applied are determined from the various correction patterns 60, and a correction execution command 64 is output to each unit based on the determined correction pattern and correction amount. ing.

Next, an example of the correction method of the present invention will be described in relation to the operation of the correction device according to the above embodiment. In addition,
In this embodiment, a case where the workpiece is a turbine blade 65 will be described.

First, in the initial state, the reference blocks 11 and 12 in the height direction shown in FIGS. 6 to 8 are arranged on a horizontal plane.
The positioning block 13 in the longitudinal direction is the turbine blade 6.
5, the positioning blocks 15 and 16 in the width direction are disposed in the retracted position, and the clamping jigs 19 and 20 in the vertical direction are respectively mounted on the reference blocks 11 and 1.
2 is located at a position retracted vertically from the second, the first, the second
Are provided at the standby position, and the first correction support mold 29 provided on the first mobile base 24 and the second to fourth correction bases provided on the second mobile base 25 are provided. The support dies 33 to 35 are disposed at positions retracted from the correction position, and are provided on a support base 36 provided on the side of the second movable base 25.
Is disposed at a position for receiving the turbine blade 65, the third movable table 39 is disposed at the standby position, and the first and second correction pressing dies 45 and 46 and
7 are also arranged at positions retracted from the operation position, and the fourth movable table 52 and the measuring device provided thereon are also arranged at the retracted position.

On the other hand, a correction target value 59 and a correction pattern (six types of patterns 1 to 6 shown in FIG. 17) 60 shown in FIG.
And the tolerance 61 are set in advance and stored in the arithmetic unit 58, respectively.

Here, in step 1 shown in FIG. 18, the turbine blade 65, which is a workpiece, is placed in the hollow sensor mounting plate 53 fixed to the fourth moving table 52 with its root 65a facing the clamp device 10 side. And is placed on a support table 36 provided on the second movable table 25. Then
The second moving table 25 is moved in a direction approaching the clamp device 10, and the root 65 a of the turbine blade 65 is inserted into a measurement station in the clamp device 10.

Next, in step 2, the turbine blade 65 as a workpiece is positioned with respect to the correction device. This positioning is performed first by the root 65a of the turbine blade 65.
Of the vertical reference blocks 11 and 12 shown in FIGS.
Then, the end face of the root 65a is brought into contact with the positioning block 13 in the longitudinal direction. Further, the positioning blocks 15 and 16 in the width direction are moved in a direction approaching each other so as to come into contact with both side surfaces in the width direction of the root 65 a of the turbine blade 65, and the upper clamp jig 19 is further lowered to thereby lower the turbine blade 65. Root 65 with flat surface
a is pressed against the upper surfaces of the reference blocks 11 and 12. Thus, the turbine blade 65 is positioned in the measurement station in the three-dimensional direction with reference to the root 65a.

Next, in step 3, the shape of the turbine blade 65 as a workpiece is measured. In the measurement of the shape, two of the measurement of the outer shape by the first measuring means of the measuring device and the measurement of the position by the second measuring means are performed.

To measure the shape of the turbine blade 65, first, the motor 5
0 is driven to rotate in the forward direction, and the fourth moving table 52 is moved in the outward direction, that is, in the direction approaching the clamp device 10 by the screw action of the screw rod 51 and the nut provided in the fourth moving table 52. Let it.

Then, the light emitting side laser sensor 5 of the measuring device
The first measuring means by the laser sensors 5a to 55i and the light receiving side laser sensors 56a to 56i is set at a predetermined position in the longitudinal direction of the turbine blade 65 as a workpiece to measure the shape of the turbine blade 65. , And outputs the measured value 62 to the arithmetic unit 58. Here, in this embodiment, as can be seen from FIG. 5 which shows the light receiving side laser sensors 56a to 56c as representatives, the light emitting side laser sensor and the light receiving side laser sensor are three in one set.
The laser light emitted from the pair of light emitting side laser sensors is combined so that a part of the light width of the laser light is overlapped. This allows
Using a laser sensor having a relatively narrow optical width, even a turbine blade 65 having a complicated cross-sectional shape having an edge,
Measurement can be performed over the entire area of the cross-sectional shape. In FIG. 5, the light-receiving-side laser sensors 56a to 56c
Are indicated by CH1 to CH3.

Next, the fourth moving table 52 is moved to the return side, that is, to a predetermined position off the tip 65b of the turbine blade 65, and the position is recognized by the position recognition sensor 57, which is the second measuring means of the measuring device. The shape of the tip 65b of the blade 65 is measured (photographed), and the measured value 63 is output to the calculator 58.

Next, in step 4, it is determined whether or not the turbine blade 65 as a workpiece is acceptable. This pass / fail judgment is made by the arithmetic unit 58 using the correction target value 59 and the tolerance 61.
And the actual measured values 62 and 63 of the turbine blade 65 are compared to determine whether or not the turbine blade 65 needs to be corrected. If the result of determination is that there is no need for correction, the procedure proceeds to step 9;

In step 5, the computing unit 58 determines the correction pattern to be executed and the correction amount from the target value 59 of the correction and the measured values 62 and 63. The correction pattern to be executed is determined by selecting from the patterns 1 to 6 shown in FIG. Next, the arithmetic unit 58 outputs a correction execution command 64 to each unit based on the calculated correction pattern and correction amount.

Next, in step 6, the turbine blade 65 is corrected according to the correction pattern and the correction amount output from the calculator 58. In this embodiment, there are six types of correction patterns to be applied to the turbine blade 65, as described above, from pattern 1 to pattern 6.

Now, when the arithmetic unit 58 calculates the pattern 5 or pattern 6 shown in FIG. 17, that is, the plus or minus torsion correction and its correction amount, and outputs the correction execution command 64, Modify as follows.

That is, the positioning blocks 15 and 16 in the width direction shown in FIGS. 6 and 7 are separated from both sides of the root 65 a of the turbine blade 65, and then the upper clamp jig 19.
To the predetermined position, and then the lower clamp jig 2
0, the root 65a of the turbine blade 65 is lifted above the reference blocks 11 and 12, and clamped by the vertical clamping jigs 19 and 20, and the turbine blade 65 is clamped by the measuring station and by the clamp station at the time of correction. Change to a clamp so that no load is applied to the components of the measuring station during correction.

In addition, via the second movable table 25, FIG.
11 is moved to a predetermined position on the tip end 65b side of the turbine blade 65, and the fourth support die 35 for correction shown in FIG.
7 is moved to an upper position corresponding to the fourth correction support die 35, and the turbine blade 65 is moved by the fourth correction support die 35 and the constraint die 47 as shown in FIG.
A predetermined position of the tip 65b is fixed. When the turbine blade 65 is torsion-corrected to the plus side based on the pattern 5, the clamp device 10 is rotated clockwise by the NC rotary table 9 shown in FIG. A predetermined rotation angle is twisted and corrected based on the correction amount calculated at 58. If the correction is made to the minus side based on the pattern 6, the clamping device 10
Is corrected by twisting a predetermined rotation angle counterclockwise as viewed from the BB direction in FIG. In either case, after the correction, the position of the tip 65b of the turbine blade 65 is measured by the position recognition sensor 57 as the second measuring means, and the measured value 63 is sent to the calculator 58. Therefore, the calculator 58 calculates the displacement amount of the turbine blade 65 and obtains the target value 59.
Is determined by comparing with. As a result of the determination, if no correction is required, the process proceeds to the next step 7. If further correction is required, the amount of correction is determined, and the above-described correction process is repeated. Modify to fit within.

In step 5, the pattern 3 shown in FIG. 17, that is, the bending correction on the ventral side of the tip 65 b of the turbine blade 65 and the correction amount are determined, and the correction execution command 64 is output. In some cases, the correction is made in step 6 as follows.

That is, the root 65a side of the turbine blade 65, which is the workpiece, is supported by the vertical clamping jigs 19, 20 while being lifted from the reference blocks 11, 12. In addition, the clamp device 10 is rotated so that the back side of the turbine blade 65 is disposed on the lower side and the tip 65b is in a horizontal state. Further, the mounting base 31 of the correction support type is set at a predetermined position in the longitudinal direction of the turbine blade 65 via the second movable base 25. Next, the fourth correction support mold 35 shown in FIGS. 11 and 13 is set to a position corresponding to the back side of the turbine blade 65 via the upper moving portion 28 of the second moving table 25. Thereafter, the fourth correction support mold 35 is moved by the hydraulic cylinder 32 through the mounting base 31 of the correction support mold.
And abut against the back side of the turbine blade 65. Further, the mounting base 43 of the correction press die is moved in the longitudinal direction of the turbine blade 65 via the third moving table 39, and is moved to a predetermined position closer to the tip 65b than the fourth correction support die 35. set. 11 and 13 via the lower moving part 42 of the third moving table 39.
The first correcting die 45 shown in FIG.
Set to a position where it touches the ventral side of. Thereafter, the mounting base 43 of the correction press die is lowered by the hydraulic cylinder 44, and the turbine blade 65 is pushed in based on the correction amount calculated by the calculator 58, plastically deformed and corrected. After this correction, the same processing as the above-described correction of the pattern 5 or the pattern 6 is performed.

Further, in step 5, the pattern 4 shown in FIG. 17, that is, the bending correction on the back side of the tip 65b of the turbine blade 65 and the amount of the correction are calculated, and the correction execution command 64 is output. In some cases, the correction is made in step 6 as follows.

That is, the root 6 of the turbine blade 65
It is supported by vertical clamping jigs 19 and 20 while being lifted from the reference blocks 11 and 12 on the 5a side. In addition, the clamp device 10 is rotated such that the belly side of the turbine blade 65 is disposed on the lower side and the tip 65b is in a horizontal state. Further, the mounting base 31 of the correction support type is set at a predetermined position in the longitudinal direction of the turbine blade 65 via the second movable base 25. Next, the third correction support mold 34 shown in FIGS. 8 and 11 is connected to the turbine blade 6 via the upper moving portion 28 of the second moving table 25.
5 is set at a position corresponding to the ventral side. Thereafter, the correction is performed in the same process as in the case of the pattern 4. After the correction,
Processing is performed in the same manner as the correction of the pattern 5 or the pattern 6.

In step 5, the pattern 1 shown in FIG. 17, that is, the bending correction on the abdominal side of the root 65 a of the turbine blade 65 and the correction amount are determined, and the correction execution command 64 is output. At this time, the correction is made in step 6 as follows.

That is, the vertical jigs 19,
20, the root 65a of the turbine blade 65 is clamped, the clamp device 10 is rotated, and the back side of the turbine blade 65 is arranged on the lower side and the root 65a is set to be horizontal. Next, the upper clamp jig 19 is raised, and the turbine blade 65 is unclamped.

Further, the first movable base 24 is moved, and the first correction support mold 29 attached thereto is
The root 65a of the turbine blade 65 is set at a position where it can be received. Further, the first correction support mold 29 is raised by the hydraulic cylinder 30 and set to the receiving level of the root 65 a of the turbine blade 65.

Further, the second moving table 25 is moved, and the fixing support type mounting table 31 is moved to the turbine blade 65.
Set at a predetermined position in the length direction. Further, the upper moving portion 28 of the second moving table 25 is moved, and as shown in FIG.
Is set below the turbine blade 65. Subsequently, the second correction support mold 33 is set to the receiving level of the turbine blade 65 by the hydraulic cylinder 32 via the mounting table 31.

Next, the positioning block 13 is advanced by the air cylinder 14 shown in FIGS. 7 to 10, and the turbine blade 65 is pushed in its length direction. And transferred to the second correction support molds 29 and 33, as shown in FIG.
Supports the root 65 a of the turbine blade 65, and the second correction support mold 33 supports the turbine blade 65.
At a predetermined distance from the first correction support mold 29 in the longitudinal direction. In addition, the third moving table 39 is moved, and the mounting base 43 of the pressing die for correction is set above the position where the turbine blade 65 is pressed in and corrected. Further, the lower moving part 42 of the third moving table 39 is moved, and the first moving table 42 is mounted on the mounting table 43.
The first and second correction support dies 45 are replaced with the first and second correction support dies 2.
It is set above a predetermined position between 9, 33. Next, the hydraulic cylinder 44 attached to the third moving table 39
Of the first correcting die 45 via the mounting base 43
, And as shown in FIGS. 9, 11 and 12,
A predetermined position between the first and second correction support dies 29 and 33 is pushed by the first correction pressing die 45 based on the correction amount calculated by the calculator 58, and is plastically deformed and corrected. After this correction, the same processing as the correction of the pattern 5 or the pattern 6 is performed.

Further, in step 5, the pattern 2 shown in FIG. 17, that is, the bending correction on the back side of the root 65a side of the turbine blade 65 and the amount of the correction are determined, and the correction execution command 64 is output. In some cases, the correction is made in step 6 as follows.

That is, the vertical jigs 19,
After clamping the root 65a of the turbine blade 65 with 20, the clamp device 10 is rotated so that the ventral side of the turbine blade 65 is arranged on the lower side and the root 65a is set to be horizontal. Next, the turbine blade 6
Unclamp 5 Further, the first moving table 24 is moved, and the first correction support mold 29 is set at the receiving position of the root 65 a of the turbine blade 65 by the hydraulic cylinder 30. Further, the second moving table 25 is moved, and the upper moving part 28 is moved, and the third correction support mold 34 is moved by the hydraulic cylinder 32.
Is set to a position that can receive the turbine blade 65 and support a predetermined position in the longitudinal direction thereof. Next, the positioning block 13 is advanced by the air cylinder 14, and the turbine blade 65 is moved from the clamping station in the clamping device 10 to the first and third correction support dies 2.
Deliver to and support 9,34. Further, the third moving table 39 is moved and the lower moving part 42 is moved so that the second correcting pressing die 46 is moved above a predetermined position between the first and third correcting supporting dies 29 and 34. set. Subsequently, the correction is performed in the same process as the pattern 1. After the correction, the same processing as the correction of the pattern 5 or the pattern 6 is performed.

Next, in step 7 shown in FIG. 18, the shape of the turbine blade 65 corrected as described above is measured. This shape measurement is performed by the light emitting laser sensors 55a to 55i and the light receiving laser sensors 56a to 56i constituting the first measuring means of the measuring device, and the measured value 62 is sent to the calculator 58.

Subsequently, in step 8 shown in FIG. 18, the pass / fail of the corrected turbine blade 65 is determined. This pass / fail judgment is made by comparing the target value 59 and the tolerance 61 of the correction previously stored in the arithmetic unit 58 with the actual measurement value 62 of the turbine blade 65 measured in step 7. As a result of the determination, if there is no need for correction, the process proceeds to step 9;

Next, in step 9, the turbine blade 65 corrected in the above-described process is removed from the correction device, and
The second moving table 25 is placed on the supporting table 36 shown in FIGS.
And the correction stroke of one turbine blade 65 is completed.

As described above, in this embodiment, the arithmetic unit 58
In advance, a correction target value (design shape) 59, six types of correction patterns 60 necessary for correction of the turbine blade 65 and six types of correction patterns 1 to 6, and a correction tolerance 62 are stored in advance. Turbine blade 6
5 is measured by the first and second measuring means of the measuring device, and the measured values 62 and 63 are sent to the calculator 58, and the calculator 58 corrects the target value 59, various correction patterns 60, The correction pattern and the correction amount are calculated from the actual measured values 62 and 63, and a correction execution command 64 is sent to each part to correct the turbine blade 65. Therefore, the workpiece has a three-dimensional asymmetric cross section. Even the relatively long turbine blade 65 can be automatically and extremely efficiently corrected without being over-corrected.

In this embodiment, the turbine blade 6
Since the flat root 65a of the turbine blade 65 is supported as a reference when measuring the shape of the turbine blade 5, the turbine blade 65 can be stably supported and its shape can be accurately measured.

Further, in this embodiment , patterns 1 to 6
When any one of the patterns 1 to 4 is selected from among the above, an appropriate one of the second to fourth correction support dies 33 to 35 and the first and second correction pressing dies 45 and 46 is selected. 1 and the support position and the pushing position of the turbine blade 65 can also be determined.
As can be seen from the set of FIGS. 2 and 14 and the set of FIGS. 13 and 15, the two-dimensional correction of the turbine blade 65 can be performed in a single setup without changing the attitude of the turbine blade 65. It is possible to further increase.

Further, in this embodiment, the correction support type and the correction pressing die are selectively used at the time of bending correction, and the correction support type and the correction pressing die are used by the correction execution command 64 from the arithmetic unit 58. As shown in FIG. 16, the bending and torsion correction of the workpiece can be performed in one step, and the efficiency can be further improved by moving and positioning and operating the device according to the following. Is also possible.

Further, in this embodiment, when the bending is corrected by the pattern 3 or the pattern 4, the turbine blade 6
5 is supported in a cantilever manner by the fourth correction support mold 35 or the third correction support mold 34, and the tip 65 b of the turbine blade 65 is supported by the first correction press mold 45. Since the correction is performed by pushing in an oblique straight line, the calculation of the next correction force can be simplified.

In this embodiment, a measuring station for the workpiece and a clamping station for the workpiece are incorporated in the clamp device 10, and the lower surface of the workpiece is placed on the reference blocks 11 and 12 in the measuring station. The workpiece is placed, positioned by the positioning block 13 in the length direction and the positioning blocks 15 and 16 in the width direction, and then held down by the upper clamp jig 19 to measure the shape of the workpiece in this state. Thereafter, the upper clamp jig 19 is raised, the workpiece is unclamped, the lower clamp jig 20 is raised, and the turbine blade 65 is lifted.
The workpiece 65 is lifted and supported so that the workpiece is changed from the measuring station to the clamp station at the time of correction. As a result, since no load is applied to the measuring station at the time of correction, the measuring station can be maintained in a normal state, and therefore, the shape of the workpiece can be accurately measured.

Further, in this embodiment, a non-contact type first measuring means and a second measuring means, both of which are non-contact type, are provided as a workpiece measuring device. The first measuring means uses a combination of the light emitting laser sensors 55a to 55i and the light receiving laser sensors 56a to 56i, and the second measuring means uses the position recognition sensor 57. In particular, the light emitting side laser sensor 5 constituting the first measuring means
5a to 55i are appropriately arranged in a space corresponding to the outer shape of the workpiece, and arranged so that a part of the laser beam width overlaps, and the light receiving side laser sensors 56a to 56i are attached to the light emitting side laser sensors 55a to 55i. Since they are arranged to face each other, even if the workpiece has a complicated shape such as a cross-sectional shape of the steam passage of the turbine blade 65 and has an edge portion, the laser sensor is relatively inexpensive and easily available. It can be measured accurately using.

In this embodiment, the frame 1 is combined with the lower frame member 2, the upper frame member 3, the left and right side frame members 4 and 5 in a box shape, and the lower frame member 2 is The upper frame member 3 is attached to the right side frame members 4 and 5 via a coupling structure 6 that receives a reaction force of the correction support type when the workpiece is corrected.
The lower and upper frame members 2, 3 are fixed to the right side frame members 4, 5 through the coupling structure 7 for receiving the reaction force of the correcting press die when correcting the workpiece. Can be prevented, and the workpiece can be accurately corrected.

(Second Embodiment) By the way, FIG.
As shown in FIG. 20, in the method for correcting the bending and torsion of the workpiece 66, a stress-strain diagram as shown in FIG. 20 is calculated by an experiment, and the correcting force is controlled based on the diagram. But,
The mechanical properties (elastic coefficient, springback amount) of the workpiece 66 are such that the plastic deformation is applied once, and then the correction force for applying plastic deformation in the opposite direction and the correction force for applying the first plastic deformation are shown in FIG. As shown by the curves 66 and 67, the correction work is very difficult.

Therefore, in the second embodiment, a target value (design shape) of correction, various correction patterns obtained by experiments for correcting a workpiece to the target value, and a tolerance are stored in an arithmetic unit. It is stored in advance.

Next, the shape of the workpiece is actually measured,
The measured value is sent to the computing unit.

The arithmetic unit determines a correction pattern to be applied and a correction amount from the target value of the correction and the actual measured value of the workpiece, and outputs a correction execution command.

Next, based on the determined correction pattern and correction amount, a correction force is applied to the workpiece to cause plastic deformation.

Next, the correction force applied to the workpiece is once removed, and the actual amount of plastic deformation of the workpiece is calculated. Then, the calculated amount of plastic deformation is fed back to the process of calculating the next correction force, and the correction force to be applied to the workpiece at the next correction is calculated by the calculator.

Next, the work is plastically deformed by the correction force obtained by the calculation, and the work is corrected so that the shape of the work falls within the tolerance.

As a result, according to this embodiment, even if the workpieces have different mechanical characteristics, it is possible to prevent
It can be modified efficiently.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS.

In the third embodiment shown in these figures, FIG.
As shown in FIG.
And a case where the correction pattern selected by the arithmetic unit is a bending correction on the tip 65b side of the turbine blade 65.

In the embodiment shown in FIG. 21, the first correction support die 71 provided on the root 65a side of the turbine blade 65 and the portion near the tip 65b side of the turbine blade 65 at the time of bending correction. A second support die 72 for correction, a pressing die 73 for correction, a hydraulic cylinder 74 for controlling the pressing die 73 for correction, a displacement gauge 75 for detecting the position of the pressing die 73 for correction, a turbine First and second measuring means 76 and 77 of the measuring device for blade 65
And a calculator 78.

As the first measuring means 76, for example, the light emitting laser sensors 55a to 55i and the light receiving laser sensors 56a to 56i shown in FIGS. 1 to 5 are used. The second
, The position recognition sensor 57 shown in FIGS. 1, 2 and 11 is used.

The computing unit 78 previously stores a target value (design shape) 79 for correction, various correction patterns 80, and a correction tolerance 81. The arithmetic unit 78 includes:
The measured value 8 from the first and second measuring means 76 and 77 respectively
2, 83 are input. Further, in the arithmetic unit 78, the first
The actual measurement values 82 and 83 of the turbine blade 65 from the second measurement means 76 and 77, the correction target value 79, the various correction patterns 80 and the correction tolerance 81 are compared, and the correction pattern and the correction amount are determined. It is configured to output a correction execution command 84 to each unit including the hydraulic cylinder 74 of the indexing and correcting die 73.

In this embodiment, the shape of the turbine blade 65 at a predetermined position is measured by the first and second measuring means 76 and 77, and the measured values 82 and 83 are sent to the calculator 78.

In the computing unit 78, the turbine blade 6
5, the actual measured values 82 and 83 are fetched and collated with the correction target value 79 and various correction patterns 80 to calculate the correction pattern and the amount of deviation (Y, Z, A). Also, as shown in FIGS. 21 and 22, when the bending correction on the tip 65b side of the turbine blade 65 is selected as a correction pattern, the second correction support mold 72 from the tip 65b of the turbine blade 65 is Set position (l ₁ + l ₂ )
Then, the set position (l ₂ ) of the correction press die 73 and the press-in amount Z1 as the first correction amount are determined, and the correction execution command 84 is sent to each section. The correction amounts Z1, Z2, Z3, Z for the first, second, third, fourth, fifth,...
4, Z5,... Are obtained by the following equation (1).

[0120]

(Equation 1)

Here, the specifications of Equation 1 are shown in FIG. 21 and FIG.
Follow the display.

The position of the correction pressing die 73 at the time of performing the first correction is detected by the displacement meter 75, and the pressing by the correction pressing die 73 is performed at the time of the second correction.
Start from the position where the correction was made.

After the first correction, the correction force (load) is removed, and the position of the tip 65b of the turbine blade 65 is measured by the second measuring means 77.
Send to 8.

Therefore, the calculator 78 calculates the amount of change before and after the first correction. If there is no change, 1
The correction is performed by pushing twice the correction amount Z1 twice. If the change amount has not yet appeared, the first correction amount Z1 is pushed three times, that is, the first press amount is multiplied by the number of correction times, and the correction process is repeated until the change amount appears. carry out.

[0125] After plastically deformed to the turbine blade 65 as the workpiece is generated, and calculates the remaining amount obtained by subtracting the amount of plastic deformation from the correction amount Y ₁ to the arithmetic unit 78 targets, the remaining amount in the last push-in amount Correct with the added push-in amount,
This is repeated until the target value (design shape) 79 is obtained.

When the corrected shape falls within the correction tolerance 81, one correction stroke is completed.

The root 65a of the turbine blade 65
The side bending correction and the torsion correction are performed in the same steps as described above.

As described above, in this embodiment, the correction method is patterned. When a correction force is applied to a workpiece to correct it, the correction force is set to 1 at a stage where no change occurs in the workpiece. A correction force obtained by multiplying the correction force by the number of corrections is given and corrected, and from the stage where a change occurs in the workpiece, a remaining amount obtained by subtracting the plastic deformation amount from the target correction amount is calculated,
Correction is performed with the correction force obtained by adding the remaining amount to the previous correction force, so that even workpieces with different mechanical characteristics can be corrected efficiently without overcorrection. Can be.

As described above, as a result of avoiding overcorrection, the bending stress applied to the bent portion of the workpiece can be applied as a load from one direction, so that the residual stress can be made uniform.

Further, since there is no overcorrection, the method is not limited to the method of correcting the workpiece in the Y-direction (left-right direction), the Z-direction (vertical direction), and the A-direction (twist direction) one by one.
It is also possible to correct the directions at the same time.

The present invention can be applied not only to the modification of the turbine blade 65 but also to other workpieces, and is particularly advantageous when applied to a workpiece having a three-dimensionally complicated shape.

[0132]

According to the present invention described above, the following effects can be obtained.

[0133]

[0134]

(Claim 1) A design shape, which is a target value for correction, various correction patterns obtained by experiments for correcting a workpiece to the target value, and a tolerance are set in advance, and correction is performed. the previous shape of the workpiece is measured, the indexing a target value and correction from the measured value pattern and the first correction amount, the workpiece based on BiOsamu positive amount Oyo the indexed fix pattern after the addition of modified, once removed modify force, then the plastic deformation of first amendments after the workpiece is measured, after correction and before modification
Comparing the measurement results, if no plastic deformation has occurred in the workpiece, it is repeated from the second time until a plastic deformation occurs in the workpiece by a correction amount obtained by multiplying the first correction amount by the number of correction times. If the work is plastically deformed by adding a correction, the remaining amount is calculated by subtracting the amount of plastic deformation of the work from the target value of the correction, and the correction is performed by adding the remaining amount to the immediately preceding correction amount. Correct the workpiece by the amount, and repeatedly perform this correction, so that the shape of the workpiece is corrected to be within the tolerance, even if the workpiece has different mechanical characteristics, There is an effect that overcorrection can be accurately prevented and corrected efficiently.

[0136]

[0137]

[0138]

(Claim 2) A frame and one end of the workpiece when measuring the shape of the workpiece
Measuring station that clamps the lower surface of the
From the measuring station when correcting the workpiece.
Clamp station that lifts and clamps the workpiece
And a clamping device that positions and clamps the workpiece in its length, width, and up and down directions , and is formed in a hollow shape through which the workpiece can be inserted.
A sensor mounting plate that can be moved in the
At the specified position in the length direction of the workpiece
Non-contact type sensor that measures and outputs the external shape of the device
The configured first measuring means and the change corresponding to the added correction
Position recognition sensor located at the end of the workpiece
A measuring device comprising a second measuring means composed of
Correction support die that supports the workpiece at the time of correction, correction pressing die that applies plasticity to the workpiece by applying a correction force, twisting correction means for the workpiece, and the design shape, which is the target value of the correction, and experiments Various correction patterns and tolerances determined by the above are stored in advance, and the actual measured values of the workpiece are fetched from the measuring device, and the correction pattern and the correction amount are determined from the target values and the measured values, and the correction support type is used. since an arithmetic unit for feeding a correction execution command to the corrective pushing type and twisting correction means and the measurement station of the workpiece
Since the load at the time of correction is not applied to the
Can be maintained in a normal state, and from two systems
By measuring, the shape of the workpiece is accurately measured,
It can be grasped, and according to the device of the present invention , there is an effect that the method of the present invention can be accurately performed.

[0140]

[0141]

[0142]

[0143]

[0144]

[Brief description of the drawings]

FIG. 1 is a side view showing an apparatus for carrying out the method of the present invention, with a left side flaky member removed.

FIG. 2 is a view taken in the direction of arrows BB in FIG.

FIG. 3 is an enlarged perspective view of a first measuring unit of the workpiece measuring device.

FIG. 4 is an operation explanatory view of a first measuring means shown in FIG. 3;

5 is an output characteristic diagram of the first measuring means shown in FIG.

FIG. 6 is an enlarged sectional view taken along line CC of FIG. 1;

FIG. 7 is an operation explanatory view of a measuring station of the apparatus shown in FIG. 1;

FIG. 8 is a view showing an operation of a clamp station and an operation of each part at the time of correcting a bending of a front end side of a workpiece in the apparatus shown in FIG. 1;

FIG. 9 is a view showing the operation of each unit when correcting the bending on the root side of the workpiece in the apparatus shown in FIG. 1;

FIG. 10 is a diagram showing the operation of each part when correcting the torsion of a workpiece in the apparatus shown in FIG. 1;

11 is an enlarged perspective view of the operation state of the first to fourth correction support dies, the first and second correction pressing dies, and the second measuring means of the device shown in FIG. 1;

FIG. 12 is an enlarged perspective view showing an operation of each part at the time of correcting a bending on a root side of a turbine blade as a workpiece in the apparatus shown in FIG. 1;

FIG. 13 is an enlarged perspective view showing an operation of each part at the time of correcting a bending on the tip side of a turbine blade as a workpiece in the apparatus shown in FIG. 1;

FIG. 14 is an enlarged explanatory view of the correction of the bending of the turbine blade.

FIG. 15 is an enlarged explanatory view of torsion correction of the turbine blade.

FIG. 16 is an explanatory view showing a state in which various bending correction and torsion correction of a workpiece are performed in one setup according to the present invention.

FIG. 17 is an explanatory view showing six types of patterns for correcting a turbine blade of a workpiece.

FIG. 18 is a flowchart showing steps for modifying the turbine blade.

FIG. 19 is an explanatory diagram of correction of bending of workpieces having different mechanical characteristics (elastic coefficient, springback amount).

FIG. 20 shows the stress of a workpiece having different mechanical properties.
It is a distortion diagram.

FIG. 21 is an explanatory view showing another embodiment of the present invention.

FIG. 22 is an explanatory diagram showing an algorithm for determining a correction amount in the embodiment shown in FIG. 21;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Frame of correction device, 2, 3 ... Lower and upper frame members, 4, 5 ... Left and right side frame members, 6, 7 ... Frame connection structure, 9 ... NC rotary table, 10 ... Clamp of workpiece Apparatus, 11, 12: Reference block in vertical direction of workpiece, 13: Positioning block in length direction, 15, 16 ... Positioning block in width direction,
19,20 ... Similar vertical clamp jig, 24,2
5: first and second movable tables, 29: first support type for correction, 31: mounting table for support type for correction, 33 to 35
... second to fourth correction support dies, 36 ... workpiece support base, 39 ... third moving base, 43 ... correction push die mounting base, 45, 46 ... first and second correction Push type, 47
... Constrained type for torsion correction, 52 ... Fourth moving table, 53 ... Sensor mounting plate, 54 ... Sensor mounting table, 55a-5
5i: a light-emitting side laser sensor constituting the first measuring means of the measuring device; 56a to 56i: the same light-receiving side laser sensor; 57: a position recognition sensor as the second measuring means, 58
... Calculator, 59 ... Correction target value (design shape), 60 ... Various correction patterns, 61 ... Correction tolerance, 62,63 ... Measured value by first and second measuring means, 64 ... Correction execution command, 65 ... the turbine blade 65a which is the workpiece ...
The root of the turbine blade, 65b.
72: first and second correction support types, 73: correction pressing type, 75: correction pressing type displacement meter, 76, 77 ... first and second measuring means of the measuring device, 78 ... computing unit , 79: correction target value (design shape), 80: correction pattern, 81:
Correction tolerance, 82, 83... Measured values by first and second measuring means, 84.

────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yasuo Kimura 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Hitachi, Ltd. Inside the Hitachi Plant (56) References JP-A-56-23319 60-210323 (JP, A) JP-B 61-15768 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21D 3/10-3/16 F01D 5/12

Claims (2)

(57) [Claims] 1. A design shape which is a target value of correction, various correction patterns obtained by experiments for correcting a workpiece to the target value, and a tolerance are set in advance, and correction is performed.
Measured before the shaped form of the workpiece, said indexing and target value and correction from the measured value pattern and first correction amount, the correction to the workpiece based on the indexed fix pattern and correction amount After adding , remove the correction power once and
In the plastic deformation of the workpiece after the first modification measures, Osamu
By comparing the measured results before and after the correction, plastic deformation
If no shape has occurred, the first correction from the second time
Plastic deformation of the work piece by the amount of correction multiplied by the number of corrections
Iteratively corrects until the shape occurs and the workpiece becomes plastic
If deformation occurs, plastic deformation of the workpiece is
The remaining amount is calculated by subtracting the amount of sexual deformation, and the remaining amount is
Workpiece is corrected by the correction amount that adds the amount, and this correction
And correcting the workpiece so that the shape of the workpiece falls within the tolerance. 2. A method for measuring a shape of a workpiece, comprising:
Press the lower surface of one end of the workpiece against the reference surface to clamp it.
Measuring station and the measuring station
Clamp that lifts and clamps the workpiece from the
Is set, and the work piece is
Position, width direction and vertical direction and clamp
It is formed with a clamp device and a hollow through which the workpiece can be inserted.
Sensor mounting that can be moved in the length direction of the workpiece
Plate and the length of the workpiece attached to this sensor mounting plate
Non-contact type that measures and outputs the external shape at a predetermined position in the vertical direction
The first measuring means constituted by the sensors of
It is located at the end of the workpiece that is displaced
Measuring means comprising a position recognition sensor
Measuring device and a support for correction to support the workpiece at the time of correction
Plastic deformation by applying a correcting force to the metal mold and the workpiece
Pressing die for correction, torsion correction means for workpiece, and correction target
The design shape, which is the standard value, and various correction parameters
Turns and tolerances are stored in advance, and the
Capture the actual measured value of the workpiece, and set the target value and measured value
The correction pattern and correction amount are calculated from
Correction is performed for the support type, the pressing die for correction, and the torsion correction means.
And an arithmetic unit for sending a command.
Equipment for correcting workpieces with complex shapes.