A turbine blade large residual profile measuring device and measuring method

Abstract

The application discloses a turbine blade large-amount blade profile measuring device and a measuring method, and belongs to the technical field of aero-engines.The device comprises a standard blade profile plate and a standard sample, a base and two groups of support members arranged on the base, a first rotating member and a second rotating member rotatably arranged on the two groups of support members respectively, a swing member connected with the first rotating member, a first clamping assembly and a second clamping assembly, the first clamping assembly and the second clamping assembly are arranged side by side on the swing member, the first clamping assembly is used for clamping a part to be measured or the standard sample, and the second clamping assembly is used for limiting the standard blade profile plate, and a reading member and a positioning member are slidably arranged on the second rotating member.The application can cancel the traditional large-scale projection equipment to complete the rapid measurement of the large-amount blade profile, can realize the full profile measurement of each section, does not need long preparation time before measurement, and can meet the rapid measurement demand of large quantities.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engines, in particular, to a turbine blade large excess profile measuring device. In addition, the present application also relates to a measuring method using the above turbine blade large excess profile measuring device. BACKGROUND

[0002] In the technical field of aero-engines, forged turbine working blades are key components in turbine structures, which have a harsh working environment, bear high temperature, high strength complex stress, strain and centrifugal force up to several tons of force, and generate powerful power to push the plane forward with the highest efficiency, requiring the blade profile to have good thermal strength, fatigue strength and creep performance.

[0003] The existing forged turbine working blade blank profile has a large excess (about 3mm) and uneven distribution, and the blade profile is removed by precise electrolytic machining. When electrolytic machining, the size of any position in the cross section of the part under different states needs to be quickly obtained, and the measurement range needs to meet-0.2mm to +3mm to quickly output data, so as to facilitate the grouping of excess values before machining and the detection of finished products after machining.

[0004] The current detection methods mainly include:

[0005] 1. Using a large projection device. The specific method is as follows: the operator prepares the projection (installs the measuring roller, installs the enlarged drawing, aligns the tenon positioning seat, finds the height of the cross section to be measured, etc.), tests a standard part, compares the measured data with the original data of the standard part, and verifies whether the projection preparation is qualified; place the measured blade on the tenon positioning seat and lock the tenon positioning seat; roll the measuring roller along the blade profile, observe the relationship between the cross section of the measuring roller on the projector and the theoretical blade profile area of the enlarged drawing, and visually judge whether the blade profile is qualified.

[0006] 2. Three-coordinate measuring instrument. The model is compared after the probe is scanned, and the software outputs the results. However, the whole process usually takes 3-5 minutes, which does not meet the requirement of quickly outputting data in large quantities.

[0007] The existing measurement technology has the following shortcomings:

[0008] 1. The projection device is expensive, the mechanical structure has high precision and high maintenance cost. 2. When measuring with a large projection device, the measured part profile is projected and compared with the theoretical profile. In visual inspection, the operator's judgment standard is different, which is easy to cause measurement error, and the detection cannot directly output data and cannot measure the measured value in a large span range. 3. The projection preparation takes a long time, and it takes about one day to change the type each time. 4. The three-coordinate measurement process is too long, and it is difficult to meet the requirement of rapid measurement in large quantities. SUMMARY

[0009] The application provides a turbine blade large excess blade profile measuring device to solve the technical problems of expensive projection equipment, visual detection prone to human error, unable to directly output data and conduct large-span measurement, and long three-coordinate measurement process when measuring large excess blade profile using large projection equipment.

[0010] The application also provides a measuring method using the turbine blade large excess blade profile measuring device.

[0011] According to one aspect of the application, a turbine blade large excess blade profile measuring device is provided for measuring the blade profile excess value of an aero-engine turbine blade, and the turbine blade large excess blade profile measuring device comprises:

[0012] a standard blade profile plate and a standard sample, the standard blade profile plate is used as a comparison standard of the measured part, and the standard sample is used for calibrating the blade profile data of the standard blade profile plate;

[0013] a base and two groups of support members arranged on the base, a first rotating member and a second rotating member are arranged between the two groups of support members, and the first rotating member and the second rotating member are arranged side by side and are used for rotating relative to the support members, respectively;

[0014] a swinging member, the swinging member is connected with the first rotating member, and the first rotating member is used for driving the swinging member to swing;

[0015] a first clamping assembly and a second clamping assembly, the first clamping assembly and the second clamping assembly are arranged on the swinging member along the length direction of the first rotating member and swing synchronously with the swinging member, the first clamping assembly is used for clamping the measured part or the standard sample, and the second clamping assembly is used for clamping the standard blade profile plate;

[0016] a reading member and a positioning member, the reading member and the positioning member are slidingly arranged on the second rotating member, the reading member is provided with a dial indicator, the reading member is used for abutting against the standard blade profile plate to read the profile data, the reading member and the positioning member are connected through a linkage member and perform synchronous displacement, the positioning member is used for abutting against the profile of the standard sample to determine the excess between the standard blade profile plate and the standard sample through the reading of the reading member, and the positioning member is also used for abutting against the profile of the measured part to determine the excess between the measured part and the standard blade profile plate through the reading of the reading member.

[0017] Further, a sliding groove is formed in the second rotating member, the linkage member comprises a connecting member, the connecting member is slidingly arranged in the sliding groove, a first end of the connecting member is connected with the reading member and the positioning member, respectively, a second end of the connecting member is provided with a handle, the handle is used for driving the reading member and the positioning member to synchronously slide along the sliding groove to adjust the position, and the handle is also used for driving the second rotating member to rotate.

[0018] Further, the first end of the connecting piece is provided with a boss, the outer end of the boss extends outside the sliding groove of the second rotating piece, and the boss is used for connecting the reading piece and the positioning piece.

[0019] Further, the positioning piece comprises a positioning rod and a measuring roller, the positioning rod is fixedly connected to the boss, and the measuring roller is rotatably installed at the first end of the positioning rod, and the measuring roller is used for abutting against the profile of the standard sample piece or the part to be measured.

[0020] Further, the linkage further comprises a supporting piece fixedly connected to the connecting piece, a limiting groove is formed in the second clamping assembly, and the supporting piece is used for being inserted into the limiting groove when the second rotating piece rotates, so as to axially limit the reading piece and the positioning piece.

[0021] Further, the swinging piece comprises a supporting rod and a mounting plate, the first end of the supporting rod is connected to the first rotating piece, the second end of the supporting rod is connected to the mounting plate, and the mounting plate is provided with two counter gauges, the two counter gauges are respectively used for abutting against the reading piece and the positioning piece and zeroing the dial gauge on the reading piece; the first clamping assembly comprises a mounting base and a pressing plate assembly, the mounting base is used for being connected to the mounting plate, and the pressing plate assembly is used for tightly pressing and limiting the standard sample piece or the part to be measured on the mounting base.

[0022] Further, the pressing plate assembly comprises a first pressing plate, a second pressing plate, a positioning pin and a pressing bolt, the positioning pin is arranged on the mounting base to position and limit the part to be measured or the standard sample piece, the first pressing plate and the second pressing plate are arranged on the mounting base in a lifting manner and are limited and fixed by the pressing bolt, the first pressing plate and the second pressing plate are arranged in a spaced manner and are used for tightly pressing and fixing the part to be measured or the standard sample piece on the mounting base.

[0023] Further, one side of the first pressing plate facing the mounting base and one side of the second pressing plate facing the mounting base are both provided with mounting springs, and the mounting springs are sleeved on the corresponding pressing bolts.

[0024] Further, the second clamping assembly is provided with a vane limiting groove, the vane limiting groove is provided with a spring buckle and / or a spring pressing plate for limiting and fixing the standard vane plate in the vane limiting groove, and the standard vane plate is polished to form a smooth arc surface on the two side extension planes of each cross section.

[0025] According to another aspect of the present application, a turbine blade large excess blade profile measurement method is also provided, which adopts the turbine blade large excess blade profile measurement device, and comprises the following steps:

[0026] S100, placing the standard sample piece on the first clamping assembly and fixing and limiting, and placing the standard vane plate on the second clamping assembly to limit and fix;

[0027] S200, slide the reading table member and the positioning member, align the head of the dial gauge on the reading table member with the profile to be measured of the standard blade profile plate, and align the positioning member with the corresponding profile of the standard sample member, and determine the allowance between the standard blade profile plate and the standard sample member through the reading of the reading table member;

[0028] S300, select multiple cross sections on the standard blade profile plate according to requirements, synchronously rotate the first rotating member and the second rotating member to sequentially perform full profile measurement of the multiple cross sections, read the reading of the reading table member, and if the reading change is not greater than 0.01mm, the calibration of the standard blade profile plate is completed, otherwise, repair the out-of-tolerance part of the standard blade profile plate;

[0029] S400, disassemble the standard sample member, place the part to be measured on the first clamping assembly and fix the position;

[0030] S500, slide the reading table member and the positioning member, align the head of the dial gauge on the reading table member with the profile to be measured of the standard blade profile plate, and align the positioning member with the corresponding profile of the part to be measured, and determine the allowance between the part to be measured and the standard blade profile plate through the reading of the reading table member, and measure the full profile allowance value of different cross sections of the part to be measured according to requirements.

[0031] The present application has the following beneficial effects:

[0032] The turbine blade large allowance profile measuring device can cancel the traditional large projection equipment to complete the rapid measurement of the large allowance profile, the device drives the combination of the wobble member and the reading table member and the positioning member to rotate through the side-by-side arrangement of the first rotating member and the second rotating member, the first clamping assembly and the second clamping assembly are arranged side by side on the wobble member, the first clamping assembly can clamp the standard sample member or the part to be measured, and the second clamping assembly can fix the position of the standard blade profile plate. Since the reading table member and the positioning member are synchronously linked, when the clamping assembly is placed with the standard sample member, the profile of the standard sample member is abutted through the positioning member, at this time, the reading of the standard blade profile plate is measured through the reading table member, the allowance between the standard blade profile plate and the standard sample member is determined, and the standard blade profile plate is calibrated. When the clamping assembly is placed with the part to be measured, the profile of the part to be measured is abutted through the positioning member, at this time, the reading of the standard blade profile plate is measured through the reading table member, the allowance between the part to be measured and the standard blade profile plate is determined, the measurement speed is greatly improved when the part to be measured is detected, the replacement of the part is convenient, the demand of large batch measurement can be effectively met, the full profile measurement of different cross sections can be realized, the detection standard is unchanged, the calibrated standard blade profile plate is used as the unified standard, the detection of different parts to be measured can directly read out the detection data through the dial gauge, and the error is smaller. The measuring device structure is simple, the device cost is low, and the replacement of parts is easy, the overall operation is convenient, high-cost operation training is not needed, the type replacement operation and the measurement reading are very intuitive, and the measurement efficiency can be effectively improved.

[0033] The turbine blade large excess profile measuring method has the above beneficial effects.

[0034] Of course, implementing any product of the present application does not necessarily require achieving all the advantages described above at the same time. In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which form a part of this application, are intended to provide further understanding of the application and are incorporated herein in their entirety, and they are used for explaining the present application together with the description. In the drawings:

[0036] Figure 1 is a schematic diagram of the overall structure of the preferred embodiment of the present application;

[0037] Figure 2 is a schematic diagram of the side view of the preferred embodiment of the present application.

[0038] Figure 3 is a schematic diagram of the structure of the first clamping assembly of the preferred embodiment of the present application.

[0039] Figure 4 is a schematic diagram of the standard profile plate before improvement of the preferred embodiment of the present application.

[0040] Figure 5 is a schematic diagram of the error in measurement of the standard profile plate before improvement of the preferred embodiment of the present application.

[0041] Figure 6 is a schematic diagram of the front view of the standard profile plate after improvement of the preferred embodiment of the present application.

[0042] Figure 7 is a schematic diagram of the side view of the standard profile plate after improvement of the preferred embodiment of the present application.

[0043] Figure 8 is a schematic diagram of the profile excess of the part to be measured of the preferred embodiment of the present application.

[0044] Figure 9 is a schematic diagram of the front view of the standard sample of the preferred embodiment of the present application.

[0045] Figure 10 is a schematic diagram of the side view of the standard sample of the preferred embodiment of the present application.

[0046] Legend: 1, base; 2, support; 3, handle; 4, connecting piece; 5, swing piece; 6, standard profile plate; 7, second clamping assembly; 8, counter surface; 9, reading piece; 10, first clamping assembly; 101, mounting base plate; 102, nut; 103, mounting spring; 104, first pressing plate; 105, nut; 106, positioning pin; 107, second pressing plate; 11, part to be measured; 12, positioning piece; 13, first rotating piece; 14, abutting piece. DETAILED DESCRIPTION

[0047] The embodiments of the present application are described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the following.

[0048] A turbine blade large excess profile measuring device is used for measuring the turbine blade profile excess value of an aero-engine, and the turbine blade large excess profile measuring device comprises:

[0049] A standard profile plate 6 and a standard sample, the standard profile plate 6 is used as a comparison standard of the part to be measured 11, and the standard sample is used for calibrating the profile data of the standard profile plate 6;

[0050] A base 1 and two groups of support pieces 2 arranged on the base 1, a first rotating piece 13 and a second rotating piece arranged between the two groups of support pieces 2, the first rotating piece 13 and the second rotating piece are arranged side by side and are used for rotating relative to the support pieces 2 respectively;

[0051] A swing piece 5, the swing piece 5 is connected with the first rotating piece 13, and the first rotating piece 13 is used for driving the swing piece 5 to swing;

[0052] A first clamping assembly 10 and a second clamping assembly 7, the first clamping assembly 10 and the second clamping assembly 7 are arranged on the swing piece 5 along the length direction of the first rotating piece 13 and swing synchronously with the swing piece 5, the first clamping assembly 10 is used for clamping the part to be measured 11 or the standard sample, and the second clamping assembly 7 is used for clamping the standard profile plate 6;

[0053] A reading piece 9 and a positioning piece 12, the reading piece 9 and the positioning piece 12 are slidingly arranged on the second rotating piece, the reading piece 9 is provided with a dial indicator, the reading piece 9 is used for abutting against the standard profile plate 6 to read the profile data, the reading piece 9 is connected with the positioning piece 12 through a linkage and performs synchronous displacement, the positioning piece 12 is used for abutting against the profile of the standard sample to determine the excess between the standard profile plate 6 and the standard sample through the reading of the reading piece 9, and the positioning piece 12 is also used for abutting against the profile of the part to be measured 11 to determine the excess between the part to be measured 11 and the standard profile plate 6 through the reading of the reading piece 9.

[0054] The "standard blade plate 6" here refers to a blade plate used for comparison with each part 11 to be measured in batch measurement; and the "standard sample" here refers to a calibration piece which is not a complete blade plate structure, but can calibrate the standard blade plate 6 through the accurate blade surface of the standard sample, so as to ensure that the deviation of the blade type data of the standard blade plate 6 is not too large. The "swing piece 5" here refers to a cradle or frame structure connected with the first rotating piece 13.

[0055] The turbine blade large excess blade type measuring device can cancel the traditional large projection equipment to complete the rapid measurement of the large excess blade type. The device is driven by the first rotating piece 13 and the second rotating piece to rotate the combination of the swing piece 5 and the reading piece 9 and the positioning piece 12 in parallel. The first clamping assembly 10 and the second clamping assembly 7 are arranged in parallel on the swing piece 5. The first clamping assembly 10 can clamp the standard sample or the part 11 to be measured, and the second clamping assembly 7 can limit and fix the standard blade plate 6. Since the reading piece 9 and the positioning piece 12 are synchronously linked, when the standard sample is placed on the first clamping assembly 10, the type surface of the standard sample is abutted by the positioning piece 12. At this time, the reading piece 9 is aligned with the standard blade plate 6 to measure and read, so as to determine the excess between the standard blade plate 6 and the standard sample, thereby calibrating the standard blade plate 6. When the part 11 to be measured is placed on the first clamping assembly 10, the type surface of the part 11 to be measured is abutted by the positioning piece 12. At this time, the reading piece 9 is aligned with the standard blade plate 6 to measure and read, so as to determine the excess between the part 11 to be measured and the standard blade plate 6. In the detection of the part 11 to be measured, the measurement speed is greatly improved, the replacement of the part is convenient, the demand of large batch measurement can be effectively met, and the full surface measurement of different sections can be realized. At the same time, the detection standard is unchanged, the calibrated standard blade plate 6 is always used as the unified standard, and the detection of different parts 11 to be measured can directly read out the detection data through the dial gauge, so as to ensure smaller error.

[0056] Preferably, please refer to Figure 1 As shown in the figure, the second rotating piece is provided with a sliding groove, and the linkage member includes a connecting piece 4 which is slidingly arranged in the sliding groove. The first end of the connecting piece 4 is connected with the reading piece 9 and the positioning piece 12 respectively, and the second end of the connecting piece 4 is provided with a handle 3. The handle 3 is used to drive the reading piece 9 and the positioning piece 12 to synchronously slide along the sliding groove to adjust the position, and the handle 3 is also used to drive the second rotating piece to rotate.

[0057] It can be understood that the handle 3 can conveniently drive the first rotating part 13 and the second rotating part to rotate, facilitate the fine adjustment of the positions of the first rotating part 13 and the second rotating part, realize the accurate adjustment of the positions of the reading part 9 and the positioning part 12, and complete more accurate measurement. The handle 3 can be directly installed on the end face of the first rotating part 13, and the handle 3 of the second rotating part is installed through the connecting part 4. The first rotating part 13 and the second rotating part can adopt shaft parts.

[0058] The linkage part completes the side-by-side installation and synchronous displacement of the reading part 9 and the positioning part 12, realizes that when the positioning part 12 aligns with a certain profile of the standard sample part or the measured part 11, the head of the dial gauge of the reading part 9 needs to align with the corresponding profile on the standard blade profile plate 6, thereby realizing the measurement of different measured parts 11 with the standard blade profile plate 6 as a measurement standard, unifying the measurement standard, and conveniently and quickly reading the excess value.

[0059] In some preferred embodiments, the first end of the connecting part 4 is provided with a boss, the outer end of the boss extends outside the sliding groove of the second rotating part, and the boss is used to connect the reading part 9 and the positioning part 12.

[0060] It can be understood that the boss of the connecting part 4 not only plays a role in installing the reading part 9 and the positioning part 12, but also can cooperate with the sliding groove to limit the connecting part 4. When the connecting part 4 is rotated through the handle 3, the second rotating part can be pushed to rotate through the boss.

[0061] It should be noted that the connecting part 4 adopts a shaft part, a plurality of spring buckles can be pre-set in the sliding groove at intervals, and a clamping groove is formed on the boss of the connecting part 4 to clamp the boss at different positions, thereby realizing the limiting of the reading part 9 and the positioning part 12 after sliding to different positions, improving the stability of the reading part 9 and the positioning part 12, and further improving the measurement accuracy.

[0062] In some preferred embodiments, the positioning part 12 includes a positioning rod and a measurement roller, the positioning rod is fixedly connected to the boss, and the measurement roller is rotatably installed at the first end of the positioning rod. The measurement roller is used to abut against the profile of the standard sample part or the measured part 11.

[0063] It can be understood that, since the positioning member 12 and the reading member 9 are matched and work synchronously, the dial head of the dial gauge on the reading member 9 is usually a measuring needle structure, and the displacement of the measuring needle is used to display the measured value by amplification through the gear structure, therefore, corresponding to the dial gauge of the reading member 9, a movable measuring roller needs to be arranged on the positioning member 12, so that the measuring roller of the positioning member 12 and the dial head of the dial gauge of the reading member 9 change in height synchronously, thereby transmitting the profile size measurement of the measured part 11 to the dial head size measurement of the standard blade profile plate 6, realizing the measurement standardization with the standard blade profile plate 6 as the standard, ensuring the accuracy of the measurement, and reducing the influence on the measurement standard when replacing different measured parts 11.

[0064] Preferably, referring to Figure 2 As shown in the drawings, the linkage member further comprises a supporting and abutting member 14 fixedly connected with the connecting member 4, and a limiting groove is arranged on the second clamping assembly 7, and the supporting and abutting member 14 is used to be inserted into the limiting groove when the second rotating member rotates, so as to axially limit the reading member 9 and the positioning member 12.

[0065] It can be understood that the limiting groove can limit the supporting and abutting member 14, thereby limiting the axial displacement of the second rotating member, ensuring that the positions of the reading member 9 and the positioning member 12 do not move greatly, and improving the accuracy of the measurement.

[0066] In some preferred embodiments, a plurality of limiting grooves are arranged on the second clamping assembly 7 at intervals, and the supporting and abutting member 14 is arranged on the connecting member 4, and when the supporting and abutting member 14 slides to different positions synchronously with the connecting member 4, the supporting and abutting member 14 is limited by the limiting grooves at different positions, thereby realizing the multiple limiting of the boss of the connecting member 4 through the cooperation of the supporting and abutting member 14 and the spring buckle in the sliding groove of the second rotating member, and effectively improving the stability of the reading member 9 and the positioning member 12 during the measurement. Different limiting grooves can correspond to different measured cross sections, such as Figure 1 As shown in the drawings, the first, second and third positions correspond to three cross section positions to be measured.

[0067] Preferably, referring to Figure 1 and Figure 3 As shown in the drawings, the swinging member 5 comprises a supporting rod and a mounting plate, the first end of the supporting rod is connected with the first rotating member 13, and the second end of the supporting rod is connected with the mounting plate, and the mounting plate is provided with two counter gauges, which are used to abut against the reading member 9 and the positioning member 12 and zero the dial gauge on the reading member 9; the first clamping assembly 10 comprises a mounting base 101 and a pressing plate assembly, the mounting base 101 is used to be connected with the mounting plate, and the pressing plate assembly is used to press and limit the standard sample or the measured part 11 on the mounting base 101.

[0068] It can be understood that, when the first rotating member 13 and the second rotating member are rotated, the position of the connecting member 4 is adjusted, the reading member 9 and the positioning member 12 are aligned with the dial gauge, the reading member 9 and the positioning member 12 are homologated by the dial surface 8 on the top of the dial gauge, the dial gauge is zeroed, the consistency of the reading member 9 and the positioning member 12 is ensured, and the measurement accuracy is improved.

[0069] Preferably, referring to Figure 3 As shown in the figure, the pressing plate assembly comprises a first pressing plate 104, a second pressing plate 107, a positioning pin 106 and a pressing bolt, the positioning pin 106 is arranged on the mounting base 101 to position and limit the measured part 11 or the standard sample, the first pressing plate 104 and the second pressing plate 107 are arranged on the mounting base 101 in a lifting manner and are limited and fixed by the pressing bolt, the first pressing plate 104 and the second pressing plate 107 are arranged in a spaced manner and are used to press and fix the measured part 11 or the standard sample on the mounting base 101.

[0070] It can be understood that, the position of the first pressing plate 104 and the second pressing plate 107 is adjusted by the pressing bolt to press and fix the measured part 11 or the standard sample, and the multi-directional limiting and fixing can be realized by cooperating with the positioning pin 106, the measured part 11 or the standard sample is prevented from deviating during rotation, and the measurement accuracy is ensured. It should be noted that, the positioning pin 106 cooperates with the positioning hole on the mounting base 101, multiple positioning pins 106 can be arranged to realize the limiting in multiple directions, and the first pressing plate 104 and the second pressing plate 107 are finally locked.

[0071] In some preferred embodiments, one side of the first pressing plate 104 and one side of the second pressing plate 107 both face the mounting base 101 and are provided with mounting springs 103, and the mounting springs 103 are sleeved on the corresponding pressing bolts.

[0072] It can be understood that, the mounting springs 103 not only have a buffering effect on the first pressing plate 104 and the second pressing plate 107 to reduce the damage to the surface of the part caused by directly pressing the part, but also can push the first pressing plate 104 and the second pressing plate 107 to lift when the pressing bolt is loosened, which is convenient for taking out the part.

[0073] In some preferred embodiments, the first pressing plate 104 and the second pressing plate 107 are both T-shaped in cross section and are arranged in the mounting sleeve in a manner capable of being lifted, the mounting sleeve guides and limits the two, the mounting sleeve is arranged on the limiting platform of the mounting base 101, and the measured part 11 or the standard sample is arranged on the limiting platform. The second pressing plate 107 is fixed at a certain height by the pressing bolt matched with the nut 102, and the screw cap 105 arranged on the pressing bolt of the first pressing plate 104 limits the height of the first pressing plate 104, the height of the first pressing plate 104 is adjusted by screwing the screw cap 105, so that the height of the first pressing plate 104 on one side is adjusted to lock the part, and the part is conveniently assembled and disassembled.

[0074] Preferably, referring to Figure 1 As shown in the figure, the second clamping assembly 7 is provided with a vane limiting groove, and the vane limiting groove is provided with a spring buckle and / or a spring pressing plate for limiting and fixing the standard vane plate 6 in the vane limiting groove, and the standard vane plate 6 is polished to form a smooth arc surface on the two sides of each cross section.

[0075] It can be understood that the spring buckle and / or the spring pressing plate can press and limit the standard vane plate 6, ensure the stability of the standard vane plate 6, and facilitate disassembly.

[0076] It should be noted that the standard vane plate 6 processed by the existing process has an extension plane on the two sides of each cross section, so that when the measuring wheel of the dial gauge head measures the full profile of the standard vane plate 6, there is interference at the edge, causing an error of c in the measured value, and the value of c is generally 0.02-0.04 mm. The extension plane on the two sides of each cross section of the standard vane plate 6 is polished, the edge of each cross section of the improved standard vane plate 6 is a smooth arc surface, the detection wheel can measure the full profile, and the accuracy and integrity of detection are improved.

[0077] According to another aspect of the present application, a turbine blade large excess profile measurement method is also provided, which uses the turbine blade large excess profile measurement device described above, and includes the following steps:

[0078] S100, placing a standard sample on the first clamping assembly 10 and fixing and limiting, and placing a standard vane plate 6 on the second clamping assembly 7 and fixing and limiting;

[0079] S200, sliding the reading table piece 9 and the positioning piece 12, so that the head of the dial gauge on the reading table piece 9 is aligned with the measured profile of the standard vane plate 6, and the positioning piece 12 is aligned with the corresponding profile of the standard sample, and the excess of the standard vane plate 6 and the standard sample is determined by reading the reading table piece 9;

[0080] S300, according to the requirement, a plurality of sections are selected on the standard blade profile plate 6, the first rotating part 13 and the second rotating part are synchronously rotated to sequentially carry out full profile measurement of the plurality of sections, the reading of the reading table part 9 is read, and the calibration of the standard blade profile plate 6 is completed if the reading change is not greater than 0.01 mm, otherwise the excess part of the standard blade profile plate 6 is repaired;

[0081] S400, the standard sample part is disassembled, the part to be measured 11 is placed on the first clamping assembly 10 and fixed and limited;

[0082] S500, the reading table part 9 and the positioning part 12 are slid to align the head of the dial gauge on the reading table part 9 with the profile surface of the standard blade profile plate 6, and at the same time, the positioning part 12 is aligned with the corresponding profile surface of the part to be measured 11, the excess amount between the part to be measured 11 and the standard blade profile plate 6 is determined through the reading of the reading table part 9, and the full profile excess amount values of different sections of the part to be measured 11 are measured according to the requirement.

[0083] The large excess amount blade profile measurement also has the above beneficial effects: the traditional large projection equipment can be cancelled to complete the rapid measurement of the large excess amount blade profile, the full profile measurement of each section can be realized, long preparation time is not required before measurement, the parts are quickly disassembled and replaced, and the rapid measurement requirement of large quantities can be met.

[0084] It should be noted that in this text, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0085] The principles and implementation modes of the present application are described by applying specific examples in this text, and the above example description is only used to help understand the method and core idea of the present application. The above description is only the preferred implementation mode of the present application, and it should be pointed out that due to the limitation of language expression, there are infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, decorations or changes can be made without departing from the principles of the present application, and the above technical features can be combined in an appropriate manner, or the improved, decorated, changed or combined present application or the present application without improvement is directly applied to other occasions, which should be regarded as the protection of the present application.

Claims

1. A turbine blade large amount profile measuring device for measuring a turbine blade profile amount value of an aeroengine turbine blade, characterized by, The turbine blade large excess profile measuring device comprises: a standard profile plate (6) used as a comparison standard of the part to be measured (11) and a standard sample used for calibrating the profile data of the standard profile plate (6); a base (1) and two groups of supporting members (2) arranged on the base (1), a first rotating member (13) and a second rotating member arranged between the two groups of supporting members (2), the first rotating member (13) and the second rotating member being arranged side by side and being used for rotating relative to the supporting members (2) respectively; a swinging member (5) connected with the first rotating member (13), the first rotating member (13) being used for driving the swinging member (5) to swing; a first clamping assembly (10) and a second clamping assembly (7), the first clamping assembly (10) and the second clamping assembly (7) being arranged on the swinging member (5) along the length direction of the first rotating member (13) and swinging synchronously with the swinging member (5), the first clamping assembly (10) being used for clamping the part to be measured (11) or the standard sample, and the second clamping assembly (7) being used for clamping the standard profile plate (6); The reading element (9) and the positioning element (12) are slidingly arranged on the second rotating element, the reading element (9) is provided with a dial gauge, the reading element (9) is used for abutting against the standard blade profile plate (6) to read profile data, the reading element (9) is connected with the positioning element (12) through a linkage element and performs synchronous displacement, the positioning element (12) is used for abutting against the profile of the standard sample to determine the residual amount between the standard blade profile plate (6) and the standard sample through the reading of the reading element (9), and the positioning element (12) is also used for abutting against the profile of the part to be measured (11) to determine the residual amount between the part to be measured (11) and the standard blade profile plate (6) through the reading of the reading element (9); a sliding groove is formed in the second rotating element, the linkage element comprises a connecting element (4), the connecting element (4) is slidingly arranged in the sliding groove, the first end of the connecting element (4) is connected with the reading element (9) and the positioning element (12) respectively, the second end of the connecting element (4) is provided with a handle (3), the handle (3) is used for driving the reading element (9) and the positioning element (12) to synchronously slide along the sliding groove to adjust the position, and the handle (3) is also used for driving the second rotating element to rotate; the swinging element (5) comprises a support rod and a mounting plate, the first end of the support rod is connected with the first rotating element (13), the second end of the support rod is connected with the mounting plate, the mounting plate is provided with two counter elements, and the two counter elements are used for abutting against the reading element (9) and the positioning element (12) and zeroing the dial gauge on the reading element (9); the first clamping assembly (10) comprises a mounting base (101) and a pressing plate assembly, the mounting base (101) is used for being connected with the mounting plate, and the pressing plate assembly is used for pressing and limiting the standard sample or the part to be measured (11) on the mounting base (101); a blade limiting groove is formed in the second clamping assembly (7), a spring snap and / or a spring pressing plate used for limiting and fixing the standard blade profile plate (6) in the blade limiting groove are arranged in the blade limiting groove, and the two sides of each cross section of the standard blade profile plate (6) are polished to form smooth arc surfaces.

2. A turbine blade large deviation profile measuring device according to claim 1, wherein The first end of the connecting element (4) is provided with a boss, the outer end of the boss extends outside the sliding groove of the second rotating element, and the boss is used for connecting the reading element (9) and the positioning element (12).

3. A turbine blade large deviation profile measuring device according to claim 2, wherein The positioning element (12) comprises a positioning rod and a measuring roller, the positioning rod is fixedly connected to the boss, and the measuring roller is rotatably installed at the first end of the positioning rod and used for abutting against the profile of the standard sample or the part to be measured (11).

4. A turbine blade large deviation profile measuring device according to claim 2, wherein The linkage element further comprises a supporting element (14) fixedly connected with the connecting element (4), a limiting groove is formed in the second clamping assembly (7), and the supporting element (14) is used for being inserted into the limiting groove to axially limit the reading element (9) and the positioning element (12) when the second rotating element rotates.

5. The turbine blade large deviation profile measuring device according to claim 1, wherein The pressing plate assembly comprises a first pressing plate (104), a second pressing plate (107), a positioning pin (106) and a pressing bolt, the positioning pin (106) is arranged on the mounting base (101) to position and limit the measured part (11) or the standard sample, the first pressing plate (104) and the second pressing plate (107) are arranged on the mounting base (101) in a lifting manner and are limited and fixed by the pressing bolt, and the first pressing plate (104) and the second pressing plate (107) are arranged at intervals and are used for pressing and fixing the measured part (11) or the standard sample on the mounting base (101).

6. A turbine blade large deviation profile measuring device according to claim 5, wherein The first pressing plate (104) and the second pressing plate (107) are both provided with mounting springs (103) on the side facing the mounting base (101), and the mounting springs (103) are sleeved on the corresponding pressing bolts.

7. A turbine blade large deviation profile measuring method characterized by, The turbine blade large excess blade profile measuring device comprises the following steps: S100, placing the standard sample on the first clamping assembly (10) and fixing and limiting, and placing the standard blade profile plate (6) on the second clamping assembly (7) to limit and fix; S200, sliding the reading table piece (9) and the positioning piece (12), aligning the head of the dial gauge on the reading table piece (9) with the measured profile of the standard blade profile plate (6), and aligning the positioning piece (12) with the corresponding profile of the standard sample, and determining the excess of the standard blade profile plate (6) and the standard sample through the reading of the reading table piece (9); S300, selecting multiple cross sections on the standard blade profile plate (6) according to requirements, synchronously rotating the first rotating piece (13) and the second rotating piece to sequentially measure the full profile of the multiple cross sections, reading the reading of the reading table piece (9), and if the reading change is not greater than 0.01 mm, the calibration of the standard blade profile plate (6) is completed, otherwise the out-of-tolerance part of the standard blade profile plate (6) is repaired; S400, disassembling the standard sample, placing the measured part (11) on the first clamping assembly (10) and fixing and limiting; S500, sliding the reading table piece (9) and the positioning piece (12), aligning the head of the dial gauge on the reading table piece (9) with the measured profile of the standard blade profile plate (6), and aligning the positioning piece (12) with the corresponding profile of the measured part (11), and determining the excess between the measured part (11) and the standard blade profile plate (6) through the reading of the reading table piece (9), and measuring the full profile excess value of the measured part (11) at different cross sections according to requirements.

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