Clamping tool for blade three-coordinate detection

Abstract

The utility model discloses a clamping tool for blade three-coordinate detection. The clamping tool is provided with an indexing base and a magnetic positioning disc. The indexing base is provided with an indexing chassis and a turntable which are in circumferential rotation fit, and the indexing chassis is fixed on the blade three-coordinate detection platform; the magnetic positioning disc is fixed to the center area of the top of the rotating disc, and the magnetic positioning disc is used for adsorbing and fixing the end face of the blade root of the blade. The utility model has the technical characteristics of easy and flexible operation, fast clamping and high precision, and is beneficial to improving the blade detection efficiency and reducing the labor intensity of workers.

Description

Technical Field

[0001] The utility model relates to a blade detection auxiliary tool, in particular to a clamping tool for blade three-coordinate detection. Background Art

[0002] Gas turbine blades / steam turbine blades are one of the key components for power generation. They need to undergo strict quality inspection after forming, which involves three-coordinate inspection. In the three-coordinate inspection of blades, the blades need to be clamped and fixed on the three-coordinate inspection platform so that the blades are placed vertically on the three-coordinate inspection platform.

[0003] At present, the clamping and fixing of blades on the three-coordinate detection platform is achieved by a tightening fixture. For example, the Chinese patent literature discloses a technology named "A gas turbine blade three-coordinate size detection clamping tool", publication number CN 218380913U, publication date January 24, 2023, and a technology named "Clamping tool for three-coordinate detection of dovetail root blades", publication number CN102494649 A, publication date June 13, 2021.

[0004] Since the blade's three-coordinate detection involves the alignment of the blade's coordinate system in the three-coordinate detection equipment, the blade's clamping and positioning on the three-coordinate detection platform also involves the alignment of the coordinate system. Figure 3 The diamond structure shown in the figure has a parallel matching relationship between the air outlet side and the Y axis of the profile coordinate system, so that there is a matching angle between the detection reference of the blade root and the profile coordinate system. Based on this, when the blade is clamped on the three-coordinate detection platform, the air outlet side of the blade root should be parallel to the Y axis of the coordinate system of the three-coordinate detection equipment, so as to meet the parameter setting requirements during detection.

[0005] However, there is a matching angle between the blade root detection reference and the profile coordinate system of the above-mentioned blade, and it is difficult to achieve circumferential rotation adjustment of the clamping fixture, so that the clamped blade needs to be repeatedly adjusted in angle. There are technical problems such as cumbersome clamping process, low detection efficiency, and high labor intensity for workers, which makes it difficult to adapt to the construction of intelligent production lines. Utility Model Content

[0006] The technical purpose of the utility model is to provide a clamping tool for blade three-coordinate detection with flexible adjustment, fast clamping and good accuracy in view of the particularity of the above-mentioned blade three-coordinate detection and the shortcomings of the current clamping technology.

[0007] The technical purpose of the utility model is achieved through the following technical solutions: a clamping fixture for three-coordinate detection of blades, the clamping fixture having a dividing base and a magnetic positioning disk;

[0008] The indexing base has an indexing chassis and a rotating disk that are matched for circumferential rotation, and the indexing chassis is fixed on the blade three-coordinate detection platform;

[0009] The magnetic positioning disk is fixed at the top center area of ​​the rotating disk, and the magnetic positioning disk is used to adsorb and fix the root end surface of the blade.

[0010] The above technical measures are aimed at the particularity of the above blade three-coordinate detection. With the indexing base fixed on the three-coordinate detection platform as the reference, flexible circumferential rotation adjustment can be performed, so that the position of the blade clamped thereon in the circumferential direction can be adjusted flexibly and quickly without dead angles. At the same time, the blade is adsorbed and clamped by the magnetic positioning disk on the indexing base, and the clamping is fast. Therefore, the above technical measures have the technical characteristics of easy and flexible operation, fast clamping, and high precision, which is conducive to improving the efficiency of blade detection and reducing the labor intensity of workers.

[0011] At the center of the indexing chassis, a central bearing is arranged which is axially protruded from the top side;

[0012] At the outer edge of the indexing chassis, a rotary bearing protruding from the top side is arranged;

[0013] The turntable is assembled at the top side of the indexing chassis through a central bearing and a rotary bearing, and the turntable generates a circumferential rotation motion at the top side of the indexing chassis through the central bearing and the rotary bearing.

[0014] The indexing base of the above technical measures enables the turntable to be stably and flexibly assembled on the top side of the indexing chassis through the center bearing and the rotary bearing, thereby achieving flexible circumferential adjustability while maintaining stability.

[0015] The circumferential wall surface of the rotating disk is provided with a rotation scale; the circumferential outer wall of the dividing chassis is provided with a scale pointer.

[0016] Alternatively, the circumferential wall surface of the indexing chassis has a rotation scale; the circumferential outer wall of the turntable has a scale pointer.

[0017] The above technical measures are based on the circumferential relative rotational cooperation between the indexing chassis of the indexing base and the turntable. Through the relative cooperation between the rotating scale and the scale pointer, the rotational movement of the turntable on the indexing chassis can be controlled with high precision.

[0018] A spring positioning pin is connected to the rotating disk;

[0019] The operating end of the spring positioning pin protrudes from the top side of the rotating disk and is located at the outer periphery of the magnetic positioning disk;

[0020] The pressing end of the spring positioning pin abuts against the indexing chassis under the action of the spring elastic force.

[0021] The above technical measures flexibly lock and release the relative rotation position of the turntable on the indexing chassis through the spring positioning pin on the turntable, ensuring that the adjusted turntable maintains good stability on the indexing chassis.

[0022] The magnetic positioning disk is an electromagnetic structure with controllable magnetic force. This technical measure does not damage the blades and can also improve the flexibility and controllability of adsorption clamping.

[0023] The top view profile of the magnetic positioning disk is a rectangular structure;

[0024] The magnetic positioning disk has a first positioning straight edge and a second positioning straight edge that are matched at right angles;

[0025] When the blade is adsorbed and fixed on the magnetic positioning disk, the blade root wall surface corresponding to the back arc side is aligned with the positioning straight edge 1 of the magnetic positioning disk, and the blade root maximum convex contour corresponding to the air outlet side abuts against the positioning straight edge 2 of the magnetic positioning disk.

[0026] The magnetic positioning disk has a positioning boss 1 protruding from the top side at one of the positioning straight edges. When the blade is adsorbed and fixed on the magnetic positioning disk, the blade root wall surface corresponding to the back arc side is in close contact with the inner wall of the positioning boss 1 in a surface contact relationship.

[0027] The second positioning straight edge of the magnetic positioning disk has a second positioning boss protruding from the top side. When the blade is adsorbed and fixed on the magnetic positioning disk, the maximum outer convex contour of the blade root corresponding to the air outlet side abuts against the inner wall of the second positioning boss.

[0028] The above technical measures are based on the particularity that the root contour of the blade is basically formed in a diamond structure, and the particularity that its air outlet side is parallel to the Y-axis of the profile coordinate system, thereby forming a positioning structure with a right-angle matching relationship on the magnetic positioning disk to accurately position the adsorbed and clamped blade root.

[0029] The blade is a combustion engine blade or a steam turbine blade.

[0030] The beneficial technical effect of the utility model is: the utility model is aimed at the particularity of the above-mentioned three-coordinate detection of blades, and with the indexing base fixed on the three-coordinate detection platform as the reference, flexible circumferential rotation adjustment can be performed, so that the position of the blade clamped thereon in the circumferential direction can be adjusted flexibly and quickly without dead angles. At the same time, the blade is adsorbed and clamped by the magnetic positioning disk on the indexing base, and the clamping is fast. It has the technical characteristics of easy and flexible operation, fast clamping, and high precision, which is conducive to improving the efficiency of blade detection and reducing the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the utility model.

[0032] Figure 2 It is a partial schematic diagram of the utility model.

[0033] Figure 3 It is a schematic diagram of the profile coordinate system and blade root arrangement.

[0034] The meaning of the codes in the figure are: 1—dividing base; 11—dividing base; 12—turntable; 2—center bearing; 3—rotating bearing; 4—spring positioning pin; 5—magnetic positioning disk; 51—positioning boss one; 52—positioning boss two; 6—rotating scale; 7—scale pointer; 8—blade. DETAILED DESCRIPTION

[0035] The utility model relates to a blade detection auxiliary tooling, specifically a blade three-coordinate detection clamping tooling, as shown below in conjunction with the accompanying drawings of the specification - Figure 1 , Figure 2 and Figure 3 The technical solution of the utility model is clearly and in detail explained.

[0036] Example 1

[0037] See also Figure 1 , Figure 2 and Figure 3 As shown, a clamping fixture for three-coordinate detection of blades has a dividing base 1 and a magnetic positioning plate 5.

[0038] The indexing base 1 comprises an indexing chassis 11 and a rotating disk 12 which are matched to rotate in the circumferential direction.

[0039] The indexing chassis 11 is fixed on the blade three-coordinate detection platform, and a scale pointer 7 is provided on its circumferential outer wall, and a rotation scale 6 is provided on the circumferential wall surface of the corresponding rotating disk 12 .

[0040] A rotary bearing 3 protruding from the top side is arranged at the outer edge of the indexing chassis 11 ; a central bearing 2 protruding axially from the top side is arranged at the center.

[0041] Furthermore, the dividing base 1 of the above structure allows the turntable 12 to be stably and flexibly assembled on the top side of the dividing chassis 11 through the center bearing 2 and the rotating bearing 3, so that flexible circumferential adjustability can be achieved while maintaining stability. Based on the circumferential relative rotational matching relationship between the dividing chassis 11 and the turntable 12 of the dividing base, the rotational movement of the turntable 12 on the dividing chassis 11 can be controlled with high precision through the relative matching of the rotating scale 6 and the scale pointer 7.

[0042] The turntable 12 is connected with a spring positioning pin 4 , and the operating end of the spring positioning pin 4 protrudes from the top side of the turntable 12 and is located at the outer periphery of the magnetic positioning disk 5 .

[0043] Furthermore, the relative rotational position of the turntable 12 on the indexing chassis 11 is flexibly locked and released through the spring positioning pin 4 on the turntable 12 , thereby ensuring that the adjusted turntable 12 maintains good stability on the indexing chassis 11 .

[0044] The magnetic positioning disk 5 is an electromagnetic structure with controllable magnetic force. The magnetic positioning disk 5 is fixed at the top center area of ​​the turntable 12, and its top view outline is a rectangular structure.

[0045] Furthermore, the magnetic positioning disk 5 is used to adsorb and fix the root end face of the blade 8. When the blade 8 is adsorbed and fixed on the magnetic positioning disk 5, the root wall surface corresponding to the back arc side is in surface contact with the inner wall of the positioning boss 1 51 formed by the top protrusion of the first positioning straight edge of the magnetic positioning disk 5, and the maximum outer convex contour of the root corresponding to the air outlet side is in contact with the inner wall of the positioning boss 2 52 formed by the top protrusion of the second positioning straight edge of the magnetic positioning disk 5. Based on the particularity that the root contour of the blade 8 is basically formed in a diamond structure, and the particularity that its air outlet side is in a parallel matching relationship with the Y axis of the profile coordinate system, a positioning structure with a right-angle matching relationship is formed on the magnetic positioning disk 5 to accurately position the adsorbed and clamped blade root.

[0046] The blades 8 are combustion engine blades.

[0047] Example 2

[0048] See also Figure 1 , Figure 2 and Figure 3 As shown, a clamping fixture for three-coordinate detection of blades has a dividing base 1 and a magnetic positioning plate 5.

[0049] The indexing base 1 comprises an indexing chassis 11 and a rotating disk 12 which are matched to rotate in the circumferential direction.

[0050] The indexing chassis 11 is fixed on the blade three-coordinate detection platform, and a rotation scale 6 is provided on its circumferential outer wall, and a scale pointer 7 is provided on the circumferential wall surface of the corresponding rotating disk 12 .

[0051] A rotary bearing 3 protruding from the top side is arranged at the outer edge of the indexing chassis 11 ; a central bearing 2 protruding axially from the top side is arranged at the center.

[0052] Furthermore, the dividing base of the above structure allows the turntable 12 to be stably and flexibly assembled on the top side of the dividing chassis 11 through the center bearing 2 and the rotating bearing 3, so that flexible circumferential adjustability can be achieved while maintaining stability. Based on the circumferential relative rotational matching relationship between the dividing chassis 11 and the turntable 12 of the dividing base, the rotational movement of the turntable 12 on the dividing chassis 11 can be controlled with high precision through the relative matching of the rotating scale 6 and the scale pointer 7.

[0053] The turntable 12 is connected with a spring positioning pin 4 , and the operating end of the spring positioning pin 4 protrudes from the top side of the turntable 12 and is located at the outer periphery of the magnetic positioning disk 5 .

[0054] Furthermore, the relative rotational position of the turntable 12 on the indexing chassis 11 is flexibly locked and released through the spring positioning pin 4 on the turntable 12 , thereby ensuring that the adjusted turntable 12 maintains good stability on the indexing chassis 11 .

[0055] The magnetic positioning disk 5 is an electromagnetic structure with controllable magnetic force. The magnetic positioning disk 5 is fixed at the top center area of ​​the turntable 12, and its top view outline is a rectangular structure.

[0056] Furthermore, the magnetic positioning disk 5 is used to adsorb and fix the root end face of the blade 8. When the blade 8 is adsorbed and fixed on the magnetic positioning disk 5, the root wall surface corresponding to the back arc side is in surface contact with the inner wall of the positioning boss 1 51 formed by the top protrusion of the first positioning straight edge of the magnetic positioning disk 5, and the maximum outer convex contour of the root corresponding to the air outlet side is in contact with the inner wall of the positioning boss 2 52 formed by the top protrusion of the second positioning straight edge of the magnetic positioning disk 5. Based on the particularity that the root contour of the blade 8 is basically formed in a diamond structure, and the particularity that its air outlet side is in a parallel matching relationship with the Y axis of the profile coordinate system, a positioning structure with a right-angle matching relationship is formed on the magnetic positioning disk 5 to accurately position the adsorbed and clamped blade root.

[0057] The blades 8 are steam turbine blades.

[0058] The above specific technical solutions are only used to illustrate the present invention, rather than to limit it.

[0059] Although the present invention has been described in detail with reference to the above-mentioned specific technical solutions, those skilled in the art should understand that they can still modify the above-mentioned specific technical solutions, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the present invention.

Claims

1. A clamping tool for blade three-coordinate detection, characterized in that: The clamping tool comprises a graduation base (1) and a magnetic positioning disk (5); The indexing base (1) comprises an indexing chassis (11) and a rotating disk (12) that cooperate in circumferential rotation, and the indexing chassis (11) is fixed on a blade three-coordinate detection platform; The magnetic positioning disk (5) is fixed at the top center area of ​​the rotating disk (12), and the magnetic positioning disk (5) is used to adsorb and fix the root end surface of the blade (8).

2. According to claim 1, the clamping fixture for blade three-coordinate detection is characterized in that: A central bearing (2) is arranged at the center of the indexing chassis (11) and is axially protruded from the top side; A rotary bearing (3) protruding from the top side is arranged at the outer edge of the indexing chassis (11); The turntable (12) is assembled on the top side of the indexing chassis (11) via a central bearing (2) and a rotary bearing (3); the turntable (12) generates a circumferential rotation motion on the top side of the indexing chassis (11) via the central bearing (2) and the rotary bearing (3).

3. The clamping fixture for blade three-coordinate detection according to claim 1 or 2, characterized in that: The circumferential wall surface of the rotating disk (12) has a rotation scale (6); The circumferential outer wall of the indexing chassis (11) is provided with a scale pointer (7).

4. The clamping fixture for blade three-coordinate detection according to claim 1 or 2, characterized in that: The circumferential wall surface of the indexing chassis (11) has a rotating scale (6); The circumferential outer wall of the rotating disk (12) is provided with a scale pointer (7).

5. The clamping fixture for blade three-coordinate detection according to claim 1 or 2, characterized in that: The rotating disk (12) is connected to a spring positioning pin (4); The operating end of the spring positioning pin (4) protrudes from the top side of the rotating disk (12) and is located on the outer periphery of the magnetic positioning disk (5); The pressing end of the spring positioning pin (4) abuts against the indexing chassis (11) under the action of the spring force.

6. The clamping fixture for blade three-coordinate detection according to claim 1 is characterized in that: The magnetic positioning disk (5) is an electromagnetic structure with controllable magnetic force.

7. The clamping fixture for blade three-coordinate detection according to claim 1 or 6, characterized in that: The top view profile of the magnetic positioning disk (5) is a rectangular structure; The magnetic positioning disk (5) has a first positioning straight edge and a second positioning straight edge that are matched at right angles; when the blade (8) is adsorbed and fixed on the magnetic positioning disk (5), the blade root wall surface corresponding to the back arc side is aligned with the first positioning straight edge of the magnetic positioning disk (5), and the maximum outer convex contour of the blade root corresponding to the air outlet side is abutted against the second positioning straight edge of the magnetic positioning disk (5).

8. The clamping fixture for blade three-coordinate detection according to claim 7 is characterized in that: A positioning straight edge of the magnetic positioning disk (5) has a positioning boss (51) protruding from the top side, and when the blade (8) is adsorbed and fixed on the magnetic positioning disk (5), the blade root wall surface corresponding to the back arc side is closely attached to the inner wall of the positioning boss (51) in a surface contact relationship; The magnetic positioning disk (5) has two positioning bosses (52) protruding from the top side at two positioning straight edges, and when the blade (8) is adsorbed and fixed on the magnetic positioning disk (5), the maximum outer convex contour of the blade root corresponding to the air outlet side abuts against the inner wall of the positioning bosses (52).

9. The clamping fixture for blade three-coordinate detection according to claim 1 is characterized in that: The blade (8) is a gas engine blade or a steam turbine blade.

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