Auxiliary device for detecting size of engine blade disc

Abstract

The utility model relates to an auxiliary device for detecting the size of an engine blade disc, and the engine blade disc is provided with a cylindrical part and thin-walled cylinder parts at the two ends of the cylindrical part, and comprises a measuring cover member, a dial indicator and a meter setting cylinder member. An annular groove is formed in the side face of the measuring cover piece, and an annular face a of the groove inner wall and an annular face b of the groove outer wall are arranged in the annular groove. The annular surface a is matched with the inner diameter of the thin-wall cylinder part; the diameter of the annular surface b is greater than the outer diameter of the thin-wall cylinder part; the dial indicator is installed on the measuring cover in a position-adjustable manner, and a measuring rod of the dial indicator can extend into the annular groove. The size of the meter setting cylinder part is consistent with that of the thin-wall cylinder part; one end of the dial indicator setting cylinder piece is inserted into the annular groove, and the position of the dial indicator is adjusted; and the thin-wall cylinder part of the engine blade disc is inserted into the annular groove for detection. The beneficial effects of the utility model are that the engine blade disc can be prevented from deformation during clamping, the engine blade disc can be prevented from deformation caused by the measuring head of the dial indicator during detection, and the measurement precision can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine blade disc detection devices, in particular to an auxiliary device for detecting the size of an engine blade disc. Background Art

[0002] When a certain type of engine is manufactured, produced, or repaired, the dimensions of the engine's blade disk need to be inspected. Specifically, the outer diameter dimensions of both ends of the blade disk need to be inspected.

[0003] At present, the common detection method used by various manufacturers is: use a lathe to clamp the blade disc so that it can be rotatable, and then fix two dial indicators through a bracket, so that the measuring heads of the two dial indicators rest on the cylindrical surface of the outer diameter at both ends of the blade disc.

[0004] However, the problem is that the installation operation is relatively complicated, and the requirements for clamping the blade disc are relatively strict. Improper clamping can easily cause the blade disc to deform, making it impossible to guarantee measurement quality and product safety. This also leads to low detection efficiency.

[0005] Therefore, based on the difficulties encountered in actual testing, our company has designed an auxiliary device for engine blade disc size detection. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an auxiliary device for detecting the size of an engine blade disc to solve the problem that the engine blade disc is easily deformed when clamped, resulting in the inability to detect the size, as well as the problem of low detection efficiency.

[0007] A specific explanation of the existing problem: A certain type of engine blade disk has a cylindrical middle and thin-walled annular cylinders at both ends. The current common inspection method is to clamp the thin-walled cylinder at one end of the engine blade disk from the outer cylindrical surface (for example, using the three-jaw clamp on the lathe to clamp the thin-walled cylinder at the left end, but a portion of the thin-walled cylinder at the left end is still exposed); then use a bracket to set two dial indicators, with the measuring head of one dial indicator resting on the outer cylindrical surface of the exposed portion of the thin-walled cylinder at the left end, and the other dial indicator resting on the outer cylindrical surface of the thin-walled cylinder at the right end (or a structure similar to the three-jaw clamp is also installed on the movable tool holder of the lathe at the right end, and the engine blade disk is clamped by the three-jaw clamps at the left and right ends). Because the thin-walled cylinder at the end is easily deformed when clamped by the three-jaw clamp, the inspection quality cannot be guaranteed.

[0008] Therefore, the purpose to be achieved by the present invention is to avoid deformation of the engine blade disc during clamping, to achieve clamping without using a lathe, and to improve the efficiency of detection.

[0009] The purpose of the utility model is achieved through the following technical solutions: an auxiliary device for detecting the size of an engine blade disc, the engine blade disc having a cylindrical portion and thin-walled cylindrical portions at both ends of the cylindrical portion, including a measuring cover, a dial indicator, and a dial gauge cylinder;

[0010] The side of the measuring cover is provided with an annular groove, and the annular groove has an annular surface a on the inner wall of the groove close to the center and an annular surface b on the outer wall of the groove close to the outside; the annular surface a is adapted to the inner diameter of the thin-walled cylinder, and the diameter of the annular surface b is larger than the outer diameter of the thin-walled cylinder;

[0011] The dial indicator is mounted on the measuring cover in an adjustable position, and the measuring rod of the dial indicator can extend into the annular groove; the size of the dial indicator cylinder is consistent with that of the thin-walled cylinder;

[0012] Insert one end of the alignment cylinder into the annular groove, so that the inner surface of the alignment cylinder and the annular surface a are in good clearance, and the measuring head of the dial indicator's measuring rod can rest against the outer surface of the alignment cylinder to adjust the position of the dial indicator;

[0013] Insert the thin-walled cylinder of the engine blade disc into the annular groove, make the inner cylinder surface of the thin-walled cylinder fit with the annular surface a, and let the measuring head of the dial indicator rest on the outer cylindrical surface of the thin-walled cylinder; apply a radial outward force to the inner cylinder surface of the thin-walled cylinder through the annular surface a, and apply a radial inward force to the outer cylindrical surface of the thin-walled cylinder through the measuring head of the dial indicator, and rotate the engine blade disc for inspection. Such a structure in which the thin-walled cylinder is clamped and the inspection structure can prevent the engine blade disc from being deformed during inspection.

[0014] As a preferred technical solution of this application, the measuring cover has a mounting hole extending radially from the outer surface of the measuring cover into the annular groove. A clamping tube is threadedly fixed within the mounting hole, and the outer end of the clamping tube is formed into a clamping petal. The sleeve at the lower end of the dial indicator is inserted into the clamping tube, which is then screwed onto the petal with a nut and allowed to contract and clamp, forming a structure that allows the dial indicator to be adjusted on the measuring cover.

[0015] As a preferred technical solution of this application, the measuring cover comprises a measuring cover A and a measuring cover B;

[0016] Measuring covers A and B are positioned opposite each other, each with an annular groove on its facing surface and equipped with a corresponding dial indicator. The thin-walled cylindrical portions at each end of the engine blade disc are inserted into the corresponding annular grooves in measuring covers A and B, completing the dimensional inspection of the thin-walled cylindrical portions at both ends of the engine blade disc.

[0017] As a preferred technical solution of this application, the aforementioned measuring cover A is fixed to the tabletop via a support frame, while measuring cover B is slidably positioned on the tabletop via the support frame. After aligning measuring covers A and B using the corresponding alignment cylinders, the thin-walled cylindrical portion at the left end of the engine blade disc is inserted into the annular groove of measuring cover A. Then, measuring cover B is brought closer to measuring cover A, and the thin-walled cylindrical portion at the right end of the engine blade disc is inserted into the annular groove of measuring cover B.

[0018] As a preferred technical solution of the present application, a locking structure is provided between the support frame corresponding to the measuring cover B and the desktop, which can lock the measuring cover B by sliding it left and right.

[0019] As the preferred technical solution of this application, the diameters of the thin-walled cylinders at both ends of the engine blade disc are different, and the sizes of the corresponding annular grooves on the measuring cover A and the measuring cover B are also inconsistent. There are two corresponding matching cylinders, and they correspond to the corresponding annular grooves respectively.

[0020] As a preferred technical solution of the present application, the annular groove is smeared with grease to facilitate the insertion and rotation of the thin-walled cylinder / the surface cylinder.

[0021] To facilitate understanding, the working process and core principles of this solution are explained:

[0022] 1. Work process;

[0023] When a measuring cover is selected, during operation: (1) first perform the alignment operation, that is, insert the alignment cylinder into the annular groove of the measuring cover (the size of the alignment cylinder is consistent with that of the thin-walled cylinder), and make the inner cylinder surface of the alignment cylinder and the annular surface a of the inner wall of the annular groove close to the center to form a clearance fit, then loosen the nut and adjust the position of the dial indicator - let the measuring head of the dial indicator rest on the outer cylindrical surface of the alignment cylinder, and then rotate the alignment cylinder. If the pointer on the dial indicator always meets the set range (for example, for 0-10mm, (2) Inspection: remove the reference cylinder, insert the thin-walled cylinder of the engine blade disk into the annular groove, and make the annular surface a of the annular groove and the inner cylinder surface of the thin-walled cylinder fit in the gap (although the gap fit will cause measurement error, this error has little effect on the accuracy and is therefore ignored), let the measuring head of the dial indicator rest on the outer cylindrical surface of the thin-walled cylinder, and then rotate the engine blade disk one circle to complete the inspection;

[0024] 2. Core Principles;

[0025] When the thin-walled cylinder of the engine blade disk is inserted into the annular groove, the annular surface a of the annular groove supports the inner cylinder surface of the thin-walled cylinder, and at the same time, the measuring head of the dial indicator rests on the outer cylindrical surface of the thin-walled cylinder. Therefore, the thin-walled cylinder is clamped by the annular surface a and the measuring head of the dial indicator. Compared with the traditional three-jaw clamping method, this clamping method can prevent the thin-walled cylinder from being deformed during clamping.

[0026] In addition, when rotating the engine blade disk, since the measuring head of the dial indicator is against the outer cylindrical surface of the thin-walled cylinder, and due to the supporting force provided by the annular surface a, the measuring head of the dial indicator is not likely to squeeze and deform the thin-walled cylinder during the measurement process, thereby improving the measurement accuracy.

[0027] The utility model has the following advantages:

[0028] It can prevent the engine blade disc from being deformed when clamped, and can prevent the measuring head of the dial indicator from causing the engine blade disc to be deformed during detection, thereby improving measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of the engine blade disk;

[0030] Figure 2 This is a schematic diagram of the structure of clamping and testing one end of an engine blade disc in a measuring cover;

[0031] Figure 3 This is a schematic diagram of the structure of the installation of the measuring cover, clamping tube and nut;

[0032] Figure 4 It is a structural diagram of the clamping tube and the nut;

[0033] Figure 5 This is a structural diagram of the engine blade disc with both ends clamped with corresponding measuring covers for testing;

[0034] In the figure: 10-thin-walled cylinder;

[0035] 20-measuring cover, 21-annular groove, 22-measuring cover A, 23-measuring cover B;

[0036] 30-meter cylinder, 40-clamping tube, 41-nut. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0038] It should be noted that the directions or positional relationships indicated by "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use, or are the directions or positional relationships commonly understood by those skilled in the art. Such terms are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model.

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0040] It should be noted that, see Figure 1 and Figure 2 The present invention is directed to a blade disk of a certain type of engine, which refers to a blade disk having a cylindrical portion and thin-walled tube portions 10 at both ends of the cylindrical portion.

[0041] It should be noted that the dial indicator has a deflectable pointer and a sleeve at its bottom. The measuring rod of the dial indicator can be telescopically extended from the sleeve, and the lower end of the measuring rod rests on a measuring head on a workpiece.

[0042] It should be noted that the detection referred to in the present invention is actually the detection of the circular runout of the outer cylindrical surface of the thin-walled tube portion 10 at both ends of the engine blade disk.

[0043] The conventional inspection method is to clamp the two ends of the blade disc with three-jaw clamps on a lathe (one three-jaw clamp is built into the lathe, and the other is installed on the tool holder). Then, two dial indicators are supported by brackets, and the measuring heads of the dial indicators are placed against the outer cylindrical surface of the thin-walled cylinder 10 to measure the circular runout of the outer cylindrical surface of the thin-walled cylinder 10. Since the thin-walled cylinder of the blade disc is easily deformed during clamping, the measurement results are easily inaccurate.

[0044] See Figure Figure 1-Figure 3 , a specific embodiment of the present invention provides an auxiliary device for detecting the size of an engine blade disk, comprising a measuring cover 20, a dial indicator, and a dial gauge cylinder 30;

[0045] An annular groove 21 is formed on the side of the measuring cover 20. The inner wall surface of the annular groove 21 near the center is annular surface a, and the outer wall surface is annular surface b. Furthermore, annular surface a is required to match the inner diameter of the thin-walled cylindrical portion 10 (a clearance fit is achieved between the two), and the diameter of annular surface b is required to be greater than the outer diameter of the thin-walled cylindrical portion 10.

[0046] The dial indicator is mounted on the measuring cover 20 so that its position can be adjusted, and the measuring rod of the dial indicator can extend into the annular groove 21;

[0047] The dimensions of the surface cylinder 30 and the thin-walled cylinder 10 are consistent;

[0048] Before testing, it is necessary to calibrate the dial indicator: insert one end of the dial indicator cylinder 30 into the annular groove 21, so that the inner cylinder surface of the dial indicator cylinder 30 and the annular surface a are clearance-matched, so that the measuring head of the measuring rod of the dial indicator can rest on the outer cylindrical surface of the dial indicator cylinder 30, and adjust the position of the dial indicator; specifically, insert the dial indicator cylinder into the annular groove of the measuring cover (the size of the dial indicator cylinder is consistent with that of the thin-walled cylinder), so that the inner cylinder surface of the dial indicator cylinder and the annular surface a of the inner wall of the annular groove near the center are clearance-matched, then loosen the nut, and adjust the position of the dial indicator - let the measuring head of the dial indicator rest on the outer cylindrical surface of the dial indicator cylinder, and then rotate the dial indicator cylinder. If the rotation of the pointer on the dial indicator always meets the set range segment (for example, for a 0-10mm dial indicator, the main pointer can be deflected within the set range segment of 3-7mm), the dial indicator position adjustment is qualified;

[0049] Then, the inspection work is carried out: the thin-walled cylinder 10 of the engine blade disk is inserted into the annular groove 21, so that the inner cylinder surface of the thin-walled cylinder 10 and the annular surface a are loosely matched, and the measuring head of the dial indicator is placed against the outer cylindrical surface of the thin-walled cylinder 10; an outward force is applied radially to the inner cylinder surface of the thin-walled cylinder 10 through the annular surface a, and an inward force is applied radially to the outer cylindrical surface of the thin-walled cylinder 10 through the measuring head of the dial indicator, and the engine blade disk is rotated one circle for inspection; such a clamping structure of the thin-walled cylinder 10 and an inspection structure can prevent deformation of the engine blade disk during inspection;

[0050] It should be noted that during the detection work, when the annular surface a of the annular groove is clearance-fitted with the inner cylinder surface of the thin-walled cylinder, although the clearance fit will bring about measurement error, this error has little effect on the accuracy and is therefore ignored.

[0051] See Figure 2 and Figure 3 The structure of the dial indicator capable of adjusting its position on the measuring cover 20 will be further described below.

[0052] The measuring cover 20 has a mounting hole extending radially from the annular groove 21 and extending from the outer surface of the measuring cover 20 into the annular groove 21. A clamping tube 40 is installed within the mounting hole. The lower end of the clamping tube 40 is tubular, and the upper end is in the shape of a clamping petal. A nut 41 is threaded onto the externally threaded clamping petal. When the nut 41 is turned upward, the clamping petals contract, allowing for easy clamping. When the nut 41 is turned downward, the petals expand. The lower end of the clamping tube 40 is threaded into the mounting hole. The sleeve of the dial indicator is inserted into the clamping tube 40. Then, the nut 41 is turned upward, causing the clamping petals to secure the sleeve of the dial indicator, allowing the measuring rod of the dial indicator to extend from the sleeve into the annular groove 21. To adjust the position of the dial indicator, loosen the nut 41 to adjust the position and then tighten it again.

[0053] When measuring the thin-walled cylindrical portions 10 at both ends of the engine blade cover, the following preferred designs are available.

[0054] It should be noted that the diameters of the thin-walled cylinders 10 at both ends of the engine blade disk are different, so it may be necessary to measure the thin-walled cylinders 10 at both ends separately. The following design allows the measurement to be completed in one go.

[0055] Specifically, see Figure 5 There are two measuring covers 20, namely measuring cover A22 and measuring cover B23. The measuring covers A22 and B23 are arranged in left and right positions relative to each other, and an annular groove 21 is opened on the opposite surface of the two, and a dial indicator is placed at the position of the annular groove 21 of the two.

[0056] When calibrating: adjust the position of the dial indicator at the measuring cover A22 with the alignment cylinder part 30 whose size is consistent with the left end of the thin-walled cylinder part 10 at the left end of the engine blade disk (calibrate); adjust the position of the dial indicator at the measuring cover B23 with the alignment cylinder part 30 whose size is consistent with the right end of the thin-walled cylinder part 10 at the left end of the engine blade disk (calibrate).

[0057] During the inspection, the thin-walled cylinder 10 at the left end of the engine blade disc is inserted into the annular groove 21 of the measuring cover A22, and then the measuring cover B23 is inserted into the thin-walled cylinder 10 at the right end of the engine blade disc; then the corresponding measuring cover is fixed, and then the engine blade disc is rotated one circle to complete the inspection.

[0058] Next, the support and installation of the measuring cover 20 will be further optimized.

[0059] Specifically, the measuring cover A22 is fixed on the table through the support frame A, and the measuring cover B23 is fixed to the support frame B. The support frame B has a slider at the bottom and a slide groove on the table; when the slider slides along the slide groove, the measuring cover B23 can be close to the measuring cover A22, thereby facilitating the insertion of the two ends of the engine blade disk.

[0060] Furthermore, a threaded hole is opened on the slider, and a threaded rod is screwed into the threaded hole. The upper end of the threaded rod is provided with an annular handle. When the annular handle is rotated, the lower end of the threaded rod is pressed against the bottom surface of the slide groove, thereby locking the sliding slider (of course, there are other similar conventional locking methods of the slider and the slide groove, and even connecting the slider to the telescopic cylinder / oil cylinder for sliding action).

[0061] Preferably, grease may be applied in the annular groove 21 to facilitate the insertion and rotation of the thin-walled cylinder 10 and the counter cylinder member 30 .

[0062] The above embodiments merely represent preferred implementations, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art will be able to make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. An auxiliary device for detecting the size of an engine blade disk, wherein the engine blade disk comprises a cylindrical portion and thin-walled cylindrical portions (10) at both ends of the cylindrical portion, characterized in that: It comprises a measuring cover (20), a dial indicator, and a dial gauge cylinder (30); The measuring cover (20) has an annular groove (21) on its side, and the annular groove (21) has an annular surface a on the inner wall of the groove close to the center and an annular surface b on the outer wall of the groove close to the outside; the annular surface a is adapted to the inner diameter of the thin-walled cylinder (10), and the diameter of the annular surface b is larger than the outer diameter of the thin-walled cylinder (10); The dial indicator is mounted on the measuring cover (20) in an adjustable position, and the measuring rod of the dial indicator can extend into the annular groove (21); The size of the alignment cylinder (30) is consistent with that of the thin-walled cylinder (10); Insert one end of the alignment cylinder (30) into the annular groove (21), so that the inner cylindrical surface of the alignment cylinder (30) and the annular surface a are clearance-matched, and the measuring head of the measuring rod of the dial indicator can be against the outer cylindrical surface of the alignment cylinder (30) to adjust the position of the dial indicator; The thin-walled cylinder (10) of the engine blade disk is inserted into the annular groove (21), the inner cylinder surface of the thin-walled cylinder (10) is clearance-matched with the annular surface a, and the measuring head of the dial indicator is pressed against the outer cylinder surface of the thin-walled cylinder (10); an outward force is applied radially to the inner cylinder surface of the thin-walled cylinder (10) through the annular surface a, and an inward force is applied radially to the outer cylinder surface of the thin-walled cylinder (10) through the measuring head of the dial indicator, and the engine blade disk is rotated for detection. Such a clamping structure of the thin-walled cylinder (10) and a detection structure can prevent the engine blade disk from being deformed during detection.

2. The auxiliary device for detecting the size of an engine blade disk according to claim 1, characterized in that: The measuring cover (20) is provided with a mounting hole, which penetrates from the outer surface of the measuring cover (20) to the inside of the annular groove (21) along the radial direction of the annular groove (21); A clamping tube (40) is fixed by a thread in the mounting hole, and the outer end of the clamping tube (40) is in the shape of a petal that can be clamped; the sleeve at the lower end of the dial indicator is inserted into the clamping tube (40), and then a nut (41) is screwed on the petal and allowed to contract and clamp, forming a structure in which the dial indicator can be adjusted on the measuring cover (20).

3. The auxiliary device for detecting the size of an engine blade disk according to claim 1 or 2, characterized in that: The measuring cover (20) comprises a measuring cover A (22) and a measuring cover B (23); The measuring cover A (22) and the measuring cover B (23) are arranged in opposite positions on the left and right sides, and an annular groove (21) is opened on the opposite surfaces of the two covers, and corresponding dial indicators are installed on both covers; The thin-walled cylinders (10) at both ends of the engine blade disc are correspondingly inserted into the corresponding annular grooves of the measuring cover A (22) and the measuring cover B (23), thereby completing the size detection of the thin-walled cylinders (10) at both ends of the engine blade disc.

4. The auxiliary device for detecting the size of an engine blade disk according to claim 3, characterized in that: The measuring cover A (22) is fixed on the desktop via a support frame, and the measuring cover B (23) is arranged on the desktop via the support frame so as to be slidable left and right. After the measurement cover A (22) and the measurement cover B (23) are aligned by the corresponding alignment cylinder (30), the thin-walled cylinder (10) at the left end of the engine blade disk is inserted into the annular groove (21) of the measurement cover A (22), and then the measurement cover B (23) is brought close to the measurement cover A (22), and the thin-walled cylinder (10) at the right end of the engine blade disk is inserted into the annular groove (21) of the measurement cover B (23).

5. The auxiliary device for detecting the size of an engine blade disk according to claim 4, characterized in that: A locking structure capable of sliding and locking the measuring cover B (23) left and right is provided between the support frame corresponding to the measuring cover B (23) and the desktop.

6. The auxiliary device for detecting the size of an engine blade disk according to claim 3, characterized in that: The diameters of the thin-walled cylinders (10) at both ends of the engine blade disk are different, and the sizes of the annular grooves (21) on the corresponding measuring covers A (22) and B (23) are also different. The corresponding meter cylinders (30) have two corresponding annular grooves (21).

7. The auxiliary device for detecting the size of an engine blade disk according to claim 1, characterized in that: The annular groove (21) is coated with grease to facilitate the insertion and rotation of the thin-walled cylinder (10) / the counter cylinder (30).

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