A measuring and positioning tool and measuring method for the wall thickness of a hollow blade at the shank

Abstract

The invention discloses a measuring and positioning tool for the wall thickness of a hollow blade at the Shank, comprising a blade back side positioning tool and a blade basin side positioning tool, wherein the two positioning tools both comprise a detection template, an upper positioning plate and a side positioning plate, and the upper positioning plate and the side positioning plate are integrally arranged with the detection template, the upper positioning plate and the side positioning plate are connected to the detection template in an arc shape, the detection template and the hollow blade at the Shank are arranged with the same arc as the side surface of the fitting, a detection conical hole or a semi-conical groove is provided on the detection template, and a method for measuring the wall thickness of the hollow blade at the Shank by using the two positioning tools is disclosed; the invention performs fixed-point positioning of the wall thickness to be detected at the Shank of the hollow blade by the blade back side positioning tool and the blade basin side positioning tool, and can perform rapid and effective measurement and control of the Shank part in both the wax mold stage and the casting stage, and the accuracy of the selection of the measuring point is also improved, and the use of the same tool control also improves the consistency, stability and credibility of the data.

Description

Technical Field

[0001] The invention relates to the technical field of nondestructive testing, and in particular to a measuring and positioning tool and a measuring method for the wall thickness of a hollow blade at a shank. Background Art

[0002] In the field of aerospace, hollow blade castings are suitable for high-end aircraft engines and gas turbines, and are an indispensable precision casting. Because a large amount of high-temperature and high-pressure gas will be generated during the operation of aircraft engines and gas turbines, due to material limitations, the blade shape must be able to quickly achieve a cooling effect. Therefore, hollow blades with uniform wall thickness are used. The hollow blades attract the gas of the compressor to pass through the cavity, thereby achieving a cooling effect. When the airflow passes through the inner cavity of the blade, if the wall thickness of the hollow blade is uneven, it will directly affect the eccentricity of the blade during rotation, thereby affecting the dynamic balance of the entire turbine disc. Therefore, in the casting process of hollow blade castings, it is particularly important to measure and control the wall thickness. In the process of measuring the wall thickness of the hollow blade, it is necessary to measure the wall thickness of the designated positioning points, and the selection of the measuring points is difficult to achieve accuracy assurance. The existing hollow blade wall thickness measurement is measured by an ultrasonic measuring instrument at the designated points. The measuring points need to be evenly distributed and the wall thickness value must be within the specified value tolerance. The selection of measuring points is usually carried out by using a wall thickness card plate, but the shank of the hollow blade is relatively narrow, and its positioning and extraction are relatively troublesome. In addition, there are protrusions such as casting information and LOGO at the shank, which interfere with the positioning of the wall thickness card plate, so that the card plate cannot accurately locate the measuring point. This patent improves and innovates the wall thickness card plate at the shank to solve these problems. Summary of the invention

[0003] The main purpose of the present invention is to provide a measuring and positioning tool and a measuring method for the wall thickness of a hollow blade at the shank, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a measuring and positioning tool for the wall thickness of a hollow blade at the shank, including a blade back side positioning tool and a blade basin side positioning tool;

[0005] The blade back side positioning tool comprises a detection template 1, an upper positioning plate 1 and a side positioning plate 1, wherein the upper positioning plate 1 and the side positioning plate 1 are integrally arranged with the detection template 1, and the upper positioning plate 1 and the side positioning plate 1 are connected with the detection template 1 on a side of the back side of the blade near the hollow blade Shank in an arc shape, and the detection template 1 and the surface curvature of the back side of the blade at the hollow blade Shank are set to be the same, and the detection template 1 is provided with a detection conical hole and the side of the detection template 1 is provided with a semi-conical groove 1;

[0006] The blade basin side positioning tooling includes a detection template 2, an upper positioning plate 2 and a side positioning plate 2. The upper positioning plate 2 and the side positioning plate 2 are integrated with the detection template 2. The upper positioning plate 2 and the side positioning plate 2 are connected to a surface of the detection template 2 on the blade basin side close to the hollow blade Shank in an arc shape. The detection template 2 has the same surface curvature as the surface curvature of the blade basin side at the hollow blade Shank, and a semi-conical groove 2 is provided on the side of the detection template 2.

[0007] Preferably, the conical hole and the semi-conical groove 1 are consistent with the detection positioning point on the back side of the hollow blade at the Shank, and the semi-conical groove 2 is consistent with the detection positioning point on the blade basin side of the hollow blade at the Shank.

[0008] Preferably, the detection sample 1 is fixedly connected to handle 1 on a side away from the hollow blade, and the detection sample 2 is fixedly connected to handle 2 on a side away from the hollow blade.

[0009] Preferably, the thickness of the test sample 1 and the test sample 2 are both 1-3 mm.

[0010] Preferably, a logo shallow groove is provided on one side of the test sample 1 close to the hollow blade, and a casting shallow groove is provided on one side of the test sample 2 close to the hollow blade, and the depths of the logo shallow groove and the casting shallow groove are both 0.5-1mm.

[0011] Preferably, the diameters of the conical hole, the semi-conical groove one and the semi-conical groove two are all 1.5 to 2 mm.

[0012] A method for measuring the wall thickness of a hollow blade at the shank position comprises the following steps:

[0013] 1. Use photosensitive resin 3D printing technology to make leaf back positioning tooling and leaf basin side positioning tooling;

[0014] 2. Completely fit the inspection sample 1 in the blade back side positioning tooling with the blade back side at the hollow blade Shank, and fit the upper positioning plate 1 and the side positioning plate 1 with the inner wall of the hollow blade Shank to position the inspection sample 1;

[0015] 3. Use ultrasonic measuring instrument to measure the wall thickness of the conical hole and the semi-conical groove on the test sample, measure the fixed-point wall thickness on the back side of the hollow blade Shank leaf and compare it with the standard value;

[0016] 4. Fit the second detection sample in the blade basin side positioning tooling completely with the blade basin side at the shank of the hollow blade, and fit the second upper positioning plate and the second side positioning plate with the inner wall at the shank of the hollow blade to position the second detection sample;

[0017] 5. Use ultrasonic measuring instrument to measure the wall thickness of the upper semi-conical groove of the test sample 1 at two locations, measure the fixed-point positioning wall thickness of the Shank blade basin side of the hollow blade and compare it with the standard value;

[0018] 6. Based on the comparison between the wall thickness of the fixed-point positioning test in 3 and 5 and the standard value, determine whether the wall thickness at the Shank of the hollow blade is qualified.

[0019] Compared with the traditional technology, the beneficial effects produced by the present invention are as follows: the present invention uses the blade back side positioning tool and the blade basin side positioning tool to perform fixed-point positioning of the wall thickness to be detected at the Shank of the hollow blade, and can quickly and effectively measure and control the Shank part in both the wax mold stage and the casting stage, and the accuracy of the measurement point selection is also improved. The use of the same tool control also improves the consistency, stability and credibility of the data. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of the leaf back positioning tool of the present invention Figure 1 ;

[0021] Figure 2 A three-dimensional diagram of the leaf back positioning tool of the present invention Figure 2 ;

[0022] Figure 3 A three-dimensional diagram of the blade basin side positioning tool of the present invention Figure 1 ;

[0023] Figure 4 A three-dimensional diagram of the blade basin side positioning tool of the present invention Figure 2 ;

[0024] Figure 5 It is a schematic diagram of the positioning and fitting of the blade back side positioning tool and the hollow blade Shank of the present invention;

[0025] Figure 6 It is a schematic diagram of the positioning and fitting of the blade basin side positioning tool and the hollow blade Shank of the present invention;

[0026] Figure 7 It is a cross-sectional schematic diagram of the positioning and fitting of the blade back side positioning tool, the blade basin side positioning tool and the hollow blade at the Shank of the present invention.

[0027] In the figure: 100, leaf back side positioning tool; 200, leaf basin side positioning tool; 1, test sample 1; 2, upper positioning plate 1; 3, side positioning plate 1; 4, tapered hole; 5, semi-conical groove 1; 6, handle 1; 7, logo shallow groove; 8, test sample 2; 9, upper positioning plate 2; 10, side positioning plate 2; 11, semi-conical groove 2; 12, handle 2; 13, casting shallow groove. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] Example 1

[0030] like Figure 1-4 As shown, a measuring and positioning tool for the wall thickness of a hollow blade at the shank position includes a blade back side positioning tool 100 and a blade basin side positioning tool 200;

[0031] The blade back side positioning tool 100 comprises a detection template 1, an upper positioning plate 2 and a side positioning plate 3, wherein the upper positioning plate 2 and the side positioning plate 3 are integrally arranged with the detection template 1, and the upper positioning plate 2 and the side positioning plate 3 are connected to a side of the detection template 1 close to the back side of the hollow blade Shank in an arc shape, and the detection template 1 is arranged with the same surface curvature as the back side of the hollow blade Shank, and the detection template 1 is provided with a detection conical hole 4 and the side of the detection template 1 is provided with a semi-conical groove 5;

[0032] The blade basin side positioning tool 200 includes a detection template 28, an upper positioning plate 29 and a side positioning plate 210. The upper positioning plate 29 and the side positioning plate 210 are integrally arranged with the detection template 28. The upper positioning plate 29 and the side positioning plate 210 are connected to a surface of the detection template 28 on the blade basin side close to the hollow blade Shank in an arc shape. The detection template 28 is set to have the same surface curvature as the surface curvature of the blade basin side at the hollow blade Shank. The side of the detection template 28 is provided with a semi-conical groove 211.

[0033] In this embodiment, the blade back side positioning tooling and the blade basin side positioning tooling are both made according to the drawings using photosensitive resin 3D printing technology.

[0034] In this embodiment, the conical hole 4 and the semi-conical groove 1 5 are consistent with the detection positioning point on the back side of the hollow blade at the Shank, and the semi-conical groove 2 11 is consistent with the detection positioning point on the blade basin side of the hollow blade at the Shank.

[0035] In this embodiment, the detection sample 1 is fixedly connected to a handle 6 on a side away from the hollow blade, and the detection sample 2 8 is fixedly connected to a handle 2 12 on a side away from the hollow blade, which is conducive to placement in a narrow position.

[0036] In this embodiment, the thickness of the detection sample 1 and the detection sample 2 8 are both 1-3 mm.

[0037] In this embodiment, a logo shallow groove 7 is provided on one side of the detection sample 1 close to the hollow blade, and a casting shallow groove 13 is provided on one side of the detection sample 8 close to the hollow blade. The depths of the logo shallow groove 7 and the casting shallow groove 13 are both 0.5-1mm, which are used to avoid the casting and LOGO to prevent the protrusions from affecting the selection of measurement points.

[0038] In this embodiment, the diameters of the conical hole 4, the semi-conical groove 1 5 and the semi-conical groove 2 11 are all 1.5 to 2 mm, the diameter of the side that fits the hollow blade is 1.5 mm, and the diameter of the side away from the hollow blade is 2 mm.

[0039] Example 2

[0040] A method for measuring the wall thickness of a hollow blade at the shank position comprises the following steps:

[0041] 1. Use photosensitive resin 3D printing technology to make the leaf back side positioning tooling and leaf basin side positioning tooling according to the drawings;

[0042] 2. Fit the inspection sample 1 in the blade back side positioning tooling completely with the back side of the hollow blade at the shank, and fit the upper positioning plate 2 and the side positioning plate 3 with the inner wall of the hollow blade at the shank to position the inspection sample 1. Figure 5 , 7 As shown;

[0043] 3. Use ultrasonic measuring instrument to measure the wall thickness of the conical hole 4 and the semi-conical groove 5 on the test sample 1, measure the fixed-point positioning wall thickness of the back side of the hollow blade Shank blade and compare it with the standard value;

[0044] 4. Fit the inspection sample 2 8 in the blade basin side positioning tooling to the blade basin side of the hollow blade at the shank, and fit the upper positioning plate 2 9 and the side positioning plate 2 10 to the inner wall of the hollow blade at the shank to position the inspection sample 2 8, as shown in the figure. Figure 6 , 7 As shown;

[0045] 5. Use an ultrasonic measuring instrument to measure the wall thickness of the upper semi-conical groove 11 of the test sample 1, measure the fixed-point positioning wall thickness of the Shank blade basin side of the hollow blade and compare it with the standard value;

[0046] 6. Based on the comparison between the wall thickness of the fixed-point positioning test in 3 and 5 and the standard value, determine whether the wall thickness at the Shank of the hollow blade is qualified.

[0047] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A measuring and positioning tool for the wall thickness of a hollow blade at the shank, characterized in that: It includes a blade back side positioning tool and a blade basin side positioning tool; The blade back side positioning tool comprises a detection template 1, an upper positioning plate 1 and a side positioning plate 1, wherein the upper positioning plate 1 and the side positioning plate 1 are integrally arranged with the detection template 1, and the upper positioning plate 1 and the side positioning plate 1 are connected with the detection template 1 on a side of the back side of the blade near the hollow blade Shank in an arc shape, and the detection template 1 and the surface curvature of the back side of the blade at the hollow blade Shank are set to be the same, and the detection template 1 is provided with a detection conical hole and the side of the detection template 1 is provided with a semi-conical groove 1; The blade basin side positioning tooling comprises a second detection sample plate, a second upper positioning plate and a second side positioning plate. The second upper positioning plate and the second side positioning plate are integrally arranged with the second detection sample plate. The second upper positioning plate and the second side positioning plate are connected to a surface of the blade basin side of the second detection sample plate close to the hollow blade Shank in an arc shape. The second detection sample plate and the surface curvature of the blade basin side of the hollow blade Shank are set to be the same. The side edge of the second detection sample plate is provided with a second semi-conical groove. The conical hole and the semi-conical groove 1 are consistent with the detection positioning point on the back side of the hollow blade at the Shank, the semi-conical groove 2 is consistent with the detection positioning point on the blade basin side of the hollow blade at the Shank, the detection template 1 is fixedly connected to the handle 1 on the side away from the hollow blade, and the detection template 2 is fixedly connected to the handle 2 on the side away from the hollow blade.

2. The measuring and positioning tool for the wall thickness of a hollow blade at the shank according to claim 1, characterized in that: The thickness of the test sample 1 and the test sample 2 are both 1-3 mm.

3. The measuring and positioning tool for the wall thickness of a hollow blade at the shank according to claim 1, characterized in that: A logo shallow groove is provided on one side of the detection sample 1 close to the hollow blade, and a casting shallow groove is provided on one side of the detection sample 2 close to the hollow blade. The depths of the logo shallow groove and the casting shallow groove are both 0.5-1mm.

4. The measuring and positioning tool for the wall thickness of a hollow blade at the shank according to claim 1, characterized in that: The diameters of the conical hole, the first semi-conical groove and the second semi-conical groove are all 1.5 to 2 mm.

5. A method for measuring the wall thickness of a hollow blade at the shank, characterized in that: Based on the measuring and positioning tool for the wall thickness at the shank of the hollow blade according to any one of claims 1 to 4, the measuring method comprises the following steps:

1. Use photosensitive resin 3D printing technology to make leaf back positioning tooling and leaf basin side positioning tooling; 2. Completely fit the inspection sample 1 in the blade back side positioning tooling with the blade back side at the hollow blade Shank, and fit the upper positioning plate 1 and the side positioning plate 1 with the inner wall of the hollow blade Shank to position the inspection sample 1; 3. Use ultrasonic measuring instrument to measure the wall thickness of the conical hole and the semi-conical groove on the test sample, measure the fixed-point wall thickness on the back side of the hollow blade Shank leaf and compare it with the standard value; 4. Fit the second detection sample in the blade basin side positioning tooling completely with the blade basin side at the shank of the hollow blade, and fit the second upper positioning plate and the second side positioning plate with the inner wall at the shank of the hollow blade to position the second detection sample; 5. Use ultrasonic measuring instrument to measure the wall thickness of the upper semi-conical groove of the test sample 1 at two locations, measure the fixed-point positioning wall thickness of the Shank blade basin side of the hollow blade and compare it with the standard value; 6. Based on the comparison between the wall thickness of the fixed-point positioning test in 3 and 5 and the standard value, determine whether the wall thickness at the Shank of the hollow blade is qualified.

Images