Measuring device and method for blade welding deformation of aero-engine stator ring assembly

Abstract

The application discloses a device and method for measuring welding deformation of stator ring assembly blades, and belongs to the field of blade welding deformation measurement. The device comprises a support frame, a base, a positioning shaft, a positioning ring, a rolling support assembly, an end cover, a front sensor mounting assembly, a front laser displacement sensor, a back sensor mounting assembly, a back laser displacement sensor, an angular positioning assembly, a pressing assembly, an indexing positioning assembly and a handle. The positioning ring is sleeved on the positioning shaft and can rotate thereon. The front laser displacement sensor and the back laser displacement sensor are respectively aligned with the same measured blade from the diametrically opposite sides of the positioning ring, and are used for synchronously acquiring the front and back distance data of the blade. The indexing positioning assembly is used for locking the positioning ring when the positioning ring rotates to each blade measurement position, so that the deformation detection of all blades is completed at one time, the detection efficiency is greatly improved, and the labor intensity is effectively reduced.

Description

Technical Field

[0001] This invention belongs to the field of blade welding deformation measurement, and particularly relates to a device and method for measuring the amount of welding deformation of aero-engine stator ring assembly blades. Background Technology

[0002] The stator ring assembly is a crucial component in aero-engines, formed by assembling and welding the stator casing, blades, and inner ring. During the electron beam welding process between the casing and the blades, the blades may experience welding deformation, often exceeding the allowable profile tolerances specified in the design drawings.

[0003] To minimize the impact of electron beam welding on the blade profile and keep post-weld tolerances within acceptable limits, it is necessary to monitor the blade's deformation relative to its theoretical position during several stages, including spot welding, electron beam welding, and heat treatment. Analyzing the deformation data allows for the optimization and adjustment of electron beam welding parameters, thereby effectively controlling deformation.

[0004] However, due to the large number of measurements required and the large number of blades, using a coordinate measuring machine for inspection has problems such as long cycle time, low efficiency, and long equipment occupation, making it difficult to meet the needs of mass production and process debugging.

[0005] Therefore, there is an urgent need for a dedicated measuring device that can accurately and efficiently detect the welding deformation of blades. Summary of the Invention

[0006] In view of this, the measuring device for measuring the amount of welding deformation of the stator ring assembly blade of the present invention solves the problems that conventional methods cannot detect the amount of deformation of the stator ring assembly blade, and that the three-coordinate measuring machine has a long cycle and low efficiency, and can achieve accurate and efficient detection of the amount of welding deformation of the blade.

[0007] An apparatus for measuring the welding deformation of stator ring assembly blades, comprising:

[0008] Support frame, used to provide a mounting base for the device; The base is mounted on the support frame, and a positioning hole for mounting the positioning shaft is provided in the central area; The positioning shaft is installed vertically in the positioning hole in the central area of ​​the base; A positioning ring is fitted around the positioning shaft in a manner that allows it to rotate around the positioning shaft. It is used to support and drive the stator ring assembly under test to rotate so as to achieve the indexing and positioning of each blade. A rolling support assembly is installed between the top surface of the base and the bottom surface of the positioning ring to provide rolling support to the positioning ring; An end cap is installed on the top of the positioning shaft, and a protrusion provided at the bottom edge is partially embedded in the groove opened at the corresponding position of the positioning ring in a clearance fit manner, which can limit the axial position of the positioning ring relative to the positioning shaft. A front sensor mounting assembly is installed on the outside of the positioning ring and fixed on the base for mounting the front laser displacement sensor and positioning the front laser displacement sensor to a predetermined measurement position. A front-facing laser displacement sensor, mounted on the front-facing sensor mounting assembly, is used to measure the displacement of the blade surface from the front. The rear sensor mounting assembly is installed on the inner side above the positioning ring and fixed to the end cap for mounting the rear laser displacement sensor and positioning the rear laser displacement sensor to the predetermined measurement position. A back-side laser displacement sensor is mounted on the back-side sensor mounting assembly and is used to measure the displacement of the blade surface from the back side. The front-side laser displacement sensor and the back-side laser displacement sensor are respectively aligned with the same blade from the radially opposite sides of the positioning ring, and are used to synchronously acquire the front-side distance data and the back-side distance data of the blade. An angular positioning component is installed on the upper end face of the positioning ring near the edge of the inner hole, and is used to cooperate with the angular positioning hole of the stator ring assembly to be tested to achieve angular positioning. A clamping assembly is installed on the upper end face of the positioning ring to clamp and fix the stator ring assembly to be tested onto the positioning ring. The indexing and positioning component is installed between the outer periphery of the positioning ring and the base, and is used to achieve indexing lock when the positioning ring rotates to the measurement position of each blade. A handle is mounted on the outer periphery of the positioning ring for the operator to rotate the positioning ring.

[0009] Furthermore, the rolling support assembly includes a spacer ring, a washer ring, and steel balls. The spacer ring is installed in an annular groove on the upper end face of the base to separate and maintain the circumferential position of each steel ball; the steel balls are placed in the holes of the spacer ring to act as rolling elements and reduce the frictional resistance when the positioning ring rotates; the washer rings are respectively installed between the upper end of the steel ball and the bottom surface of the annular groove on the lower end face of the positioning ring, and between the lower end of the steel ball and the bottom surface of the annular groove on the upper end face of the base, which can transmit loads and protect the contact surface of the steel balls.

[0010] Furthermore, the front sensor mounting assembly includes a measurement reference base, a rotary positioning base, a sensor positioning block, and a positioning pin. The measurement reference base is mounted on the side of the base to provide a mounting reference for the rotary positioning base; the rotary positioning base is mounted on the upper surface of the measurement reference base to provide rotational support and a positioning groove for the sensor positioning block; the sensor positioning block has a working position and a clearance position, and is mounted in the positioning groove of the rotary positioning base for mounting the front laser displacement sensor and rotating between the working position and the clearance position; the positioning pin is used to lock the sensor positioning block in the working position or the clearance position. In the working position, the sensor positioning block is located above the inner hole of the positioning ring to align with the front of the blade; in the clearance position, the sensor positioning block rotates to the outside of the positioning ring to make room for the installation of the stator ring assembly.

[0011] Furthermore, the rear sensor mounting assembly includes a rear sensor limiting seat and a rear sensor mounting base. The rear sensor limiting seat is mounted on the upper end face of the end cap, providing a mounting base for the rear sensor mounting base; the rear sensor mounting base is mounted on the upper end of the rear sensor limiting seat, for mounting a rear laser displacement sensor, which is located above the central area of ​​the positioning ring, and its two sides maintain a predetermined distance from the center of the inner hole of the upper end face of the positioning ring, for positioning the rear laser displacement sensor at the measurement position aligned with the back of the blade.

[0012] Furthermore, the indexing and positioning assembly includes bushings B, indexing pins, and angular positioning blocks. Bushings B are evenly distributed circumferentially within annular holes on the outer periphery of the positioning ring, with each bushing B corresponding to a specific blade number, providing positioning holes for the indexing pins. The angular positioning block is fixed to the upper surface of the base and located outside the positioning ring, and has a positioning groove for engaging with the indexing pin to limit the rotation angle of the positioning ring. The indexing pin passes vertically through the hole in the bushing B and extends into the positioning groove of the angular positioning block, locking the positioning ring at the current blade measurement position.

[0013] Furthermore, the angular positioning component includes an angular positioning pin, which is vertically mounted on the upper end face of the positioning ring and is used to insert into the angular positioning hole of the stator ring assembly to be tested to determine the initial installation angle of the workpiece on the positioning ring. The angular positioning pin is located to the left of the sensor positioning block and the distance between the pin and the sensor positioning block is no more than 10mm, which can prevent interference with the sensor positioning block when the sensor positioning block is in the working position.

[0014] Furthermore, the clamping assembly is a hook-shaped clamping plate, which is distributed circumferentially on the upper end face of the positioning ring. Each hook-shaped clamping plate can rotate around its mounting hole, and the clamping end points towards the center of the positioning ring, for pressing the stator ring assembly to be tested against the upper end face of the positioning ring.

[0015] Furthermore, the device also includes a bushing A, which is interference-fitted into the central inner hole of the positioning ring to protect the central inner hole of the positioning ring and reduce wear between it and the positioning shaft. The inner hole of the bushing A and the outer circle of the positioning shaft are clearance-fitted to ensure coaxial mounting and flexible rotation of the positioning ring relative to the positioning shaft.

[0016] The method of using the device for measuring the welding deformation of stator ring assembly blades according to the present invention includes the following steps: Rotate the sensor positioning block to the clearance position, install the stationary ring assembly to be tested, and achieve angular positioning by cooperating the angular positioning pin with the angular positioning hole of the workpiece. Press the workpiece against the upper end face of the positioning ring by the hook-shaped pressure plate. Rotate the sensor positioning block to the working position and insert the positioning pin to lock it, so that the front laser displacement sensor moves to the measurement position. Read and record the measurement values ​​of the front and rear laser displacement sensors; Pull out the indexing pin, rotate the positioning ring by the handle to rotate the next numbered bushing B until it is aligned with the positioning groove of the angular positioning block, insert the indexing pin to lock the positioning ring, and read and record the sensor value corresponding to the current blade. Repeat the above steps of indexing rotation and reading until all blades have been measured.

[0017] The beneficial effects of the present invention are as follows: This method replaces the traditional coordinate measuring machine (CMM) method by directly measuring the deformation at the location of maximum welding deformation using a laser displacement sensor. While maintaining measurement accuracy, this method significantly improves inspection efficiency, offering greater practicality and automation. Furthermore, it uses a non-contact measurement method instead of the traditional contact method, enabling the detection of welding deformation for all blades in a single setup. This greatly reduces the workload for operators. Moreover, the sensor measurements are transmitted to the stator assembly via a digital display device for direct display, allowing for remote reading and effectively eliminating human error, thus improving measurement accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view of the device for measuring the welding deformation of stator ring assembly blades according to the present invention; Figure 2 This is a schematic diagram of the device for measuring the welding deformation of the stator ring assembly blades according to the present invention from another perspective. Figure 3 This is a partial structural schematic diagram of the device for measuring the welding deformation of stator ring assembly blades according to the present invention; Figure 4 This is a partial structural schematic diagram of the device for measuring the welding deformation of stator ring assembly blades according to the present invention; Figure 5 This is a partial structural schematic diagram of the device for measuring the welding deformation of stator ring assembly blades according to the present invention; Figure 6 This is a partial structural schematic diagram of the device for measuring the welding deformation of stator ring assembly blades according to the present invention; Figure 7 This is a schematic diagram of the overall structure of the device for measuring the welding deformation of the stator ring assembly blades according to the present invention; Among them, 1—base, 2—positioning ring, 3—spacer ring, 4—washer ring, 5—steel ball, 6—positioning shaft, 7—bushing A, 8—end cover, 9—measuring reference seat, 10—rotary positioning seat, 11—sensor positioning block, 12—laser displacement sensor, 13—back side sensor limit seat, 14—back side sensor mounting seat, 15—hex socket screw, 16—support frame, 17—angular positioning pin, 18—bushing B, 19—positioning pin, 20—hook-type pressure plate, 21—indexing pin, 22—handle, 23—angular positioning block. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0023] The structure, working principle, and usage of the device for measuring the welding deformation of stator ring assembly blades according to the present invention will be further explained below with reference to the accompanying drawings and embodiments.

[0024] The overall structure of the device is as follows Figures 1 to 7 As shown, the device for measuring the welding deformation of the stator ring assembly blades in this embodiment consists of a base 1, a positioning ring 2, a spacer ring 3, a washer ring 4, a steel ball 5, a positioning shaft 6, a bushing A7, an end cap 8, a measuring reference seat 9, a rotating positioning seat 10, a sensor positioning block 11, a laser displacement sensor 12, a back-side sensor limit seat 13, a back-side sensor mounting seat 14, an internal hexagon screw 15, a support frame 16, an angular positioning pin 17, a bushing B18, a positioning pin 19, a hook-shaped pressure plate 20, an indexing pin 21, a handle 22, an angular positioning block 23, cylindrical pins, and screws.

[0025] The installation and connection relationships of each component are as follows: Installation of base and support frame The base 1 is fixedly mounted on the top of the support frame 16 by screws. The central area of ​​the base 1 has an opening for the installation of the positioning shaft 6. The positioning shaft 6 is installed in the hole in the central area of ​​the base 1 and is secured with screws.

[0026] The rolling support assembly is installed as follows: a washer ring 4 is installed in the annular groove on the upper end face of the base 1, positioned with a cylindrical pin and secured with screws. A spacer ring 3 is placed in the annular groove on the upper end face of the base 1. Steel balls 5 are placed in the annular hole of the spacer ring 3 and kept in contact with the upper end face of the washer ring 4. Another washer ring 4 is installed in the annular groove at the lower end of the positioning ring 2, positioned with a cylindrical pin and secured with screws.

[0027] The locating ring is installed by, for example, by interference fit of bushing A7 into the locating hole reserved on the inner ring surface of locating ring 2. The locating ring 2 with bushing A7 installed is then installed onto the outer circle of locating shaft 6, maintaining a clearance fit, and placed on the upper surface of steel ball 5. The top surface of locating ring 2 serves as support for the part and has weight-reducing holes.

[0028] The end cap is installed by means of a cylindrical pin for positioning and a screw for fixing to the upper end face of the positioning shaft 6. The outer annular step of the end cap 8 is placed in the annular groove of the positioning ring 2 and maintains a gap with the outer cylinder and lower end face of the annular groove.

[0029] Installation of rear sensor mounting assembly The rear sensor limiting seat 13 is positioned by a cylindrical pin and fixed to the end cover 8 with screws. The rear sensor mounting seat 14 is positioned by a cylindrical pin and fixed to the rear sensor limiting seat 13 with screws.

[0030] Installation of front sensor mounting assembly The measuring reference base 9 and the angular positioning block 23 are respectively positioned by cylindrical pins and fixed to the base 1 with screws. The rotary positioning base 10 is positioned by cylindrical pins and fixed to the measuring reference base 9 with screws. The sensor positioning block 11 is installed in the positioning groove of the rotary positioning base 10, and after being positioned by the positioning pin 19, it is tightened with screws.

[0031] The four laser displacement sensors are installed as follows: two laser displacement sensors 12 are mounted on the sensor positioning block 11 and secured with screws, while the other two laser displacement sensors 12 are mounted on the rear sensor mounting base 14. The display screens of the laser displacement sensors 12 are fixed to the side of the support frame 16 with screws.

[0032] The installation of auxiliary components, such as clamping components, indexing and positioning components, and handles, is as follows: The hook-shaped pressure plate 20 is installed in the mounting hole of the positioning ring 2 and secured with screws. The bushing B18 is installed in the annular hole of the positioning ring 2. The handle 22 is installed in the threaded hole of the positioning ring 2. The indexing pin 21 is installed in the hole of bushing B18 (number 1) and in the oblong groove of the angular positioning block 23.

[0033] Angle locating pin 17 is installed in the hole of locating ring 2.

[0034] Working principle The core measurement principle of this device is to directly measure the distance value on the blade surface using a non-contact laser displacement sensor to obtain data on the blade welding deformation. Specifically... The stator ring assembly to be tested is installed in the inner hole of the upper end face of the positioning ring 2. Angular positioning is achieved by the angular positioning pin 17, and axial clamping is achieved by the hook-shaped pressure plate 20. The positioning ring 2 is coaxially fitted onto the positioning shaft 6 through the bushing A7, and is supported on the base 1 by the rolling of the steel balls 5, allowing it to rotate flexibly around the positioning shaft 6.

[0035] A front-side laser displacement sensor 12 is mounted on a sensor positioning block 11, illuminating the blade surface from the outside (front) of the blade flow channel. A back-side laser displacement sensor 12 is mounted on a back-side sensor mounting base 14, illuminating the same blade surface from the inside (back) of the blade flow channel. The two sets of sensors are arranged radially opposite each other, synchronously acquiring distance data from the front and back sides of the same blade.

[0036] When switching between measuring different blades, the operator removes the indexing pin 21, rotates the positioning ring 2 via the handle 22, causing the next numbered bushing B18 to rotate until it aligns with the positioning groove of the angular positioning block 23, and then reinserts the indexing pin 21 to lock the positioning ring 2. This indexing rotation method allows for the measurement of the deformation of all blades in a single clamping operation.

[0037] After the measurement is completed, the measured value of each sensor is compared with the theoretical value (or the measured value after the initial spot welding), and the difference is the welding deformation of that blade. By analyzing the deformation data of all blades, the location and amount of deformation of blades with large deformation can be identified, providing data support for subsequent adjustment of electron beam welding parameters.

[0038] The device for measuring the welding deformation of stator ring assembly blades as described in this invention, when measuring the deformation of stator ring assembly blades, first turns on the power of the laser displacement sensor 12 and its display screen, checks whether the angular positioning pin 17 is on the left side of the sensor positioning block 11 and the distance between it and the positioning block is no more than 10mm, and whether the indexing pin 21 is installed in the bushing B18 hole near the serial number 1; pull out the positioning pin 19 installed on the rotating positioning seat 10 near the center, rotate the sensor positioning block 11 with two laser displacement sensors 12 installed by 180 degrees so that it contacts the outside of the rotating positioning seat; then loosen the screws of the clamping hook-shaped pressure plate 20 and rotate the hook-shaped pressure plate by 180 degrees so that it faces away from the center, and install the stator ring assembly on the positioning... The stator ring assembly is installed in the inner hole of the upper end face of ring 2. Then, the angular positioning hole of the stator ring assembly is installed on the angular positioning pin 17. After the end face of the stator housing is aligned with the end face of the upper end face of the positioning ring, the stator ring assembly is pressed onto the positioning ring using the hook-shaped pressure plate 20. Then, the sensor positioning block 11 is rotated to the working position, the positioning pin 19 is inserted, and the sensor positioning block 11 is tightened with screws. The values ​​of the four sensors on the display screen of the laser displacement sensor 12 are read and recorded. Then, the indexing pin 21 is pulled out. The bushing B18 hole marked 2 on the positioning ring is rotated to align with the positioning groove of the angular positioning block 23 installed on the base 1 using the handle 22 installed on the positioning ring 2. The indexing pin 21 is then inserted, the display screen value is read, and the value is recorded in the table of the corresponding numbered blade. The above operation is repeated until the last blade is rotated to measure and record the data. After the measurement is completed, the measurement values ​​of each sensor are compared to find the blade position and deformation amount with large deformation, providing data support for subsequent adjustment of electron beam welding parameters.

[0039] The working principle of each core component will be explained in further detail below, taking into account the cooperation relationship between the components.

[0040] (a) Support frame and base The support frame 16 provides a stable mounting base for the entire device, and is fixed to the testing platform or the ground by anchor bolts or pressure plates. The base 1 is fixedly mounted on the upper end of the support frame 16, serving as the mounting base for all upper components. The upper surface of the base 1 is precision-machined, and the annular groove and positioning holes are based on the upper surface of the base to ensure positional accuracy between the various mounting parts. The flatness of the upper surface of the base 1 directly affects the rotational stability of the positioning ring 2 and the consistency of the sensor measurement reference.

[0041] (ii) Rolling support components The rolling support assembly consists of a spacer ring 3, a washer ring 4, and steel balls 5. Its function is to form a rolling friction pair between the base 1 and the positioning ring 2, so as to realize the low-resistance flexible rotation of the positioning ring 2.

[0042] The spacer ring 3 is an annular retainer structure with several circular holes evenly distributed along its circumference, each containing a steel ball 5. The spacer ring 3 evenly separates the steel balls 5, preventing them from contacting each other and causing additional friction and collision, ensuring that the steel balls are evenly distributed in the circumferential direction, so that the positioning ring 2 obtains uniform support stiffness.

[0043] The steel ball 5 acts as a rolling element, forming rolling contact with the upper and lower washers 4. When the positioning ring 2 is subjected to a tangential force (driven by the handle 22), the steel ball 5 rolls between the upper and lower washers 4, converting sliding friction into rolling friction and significantly reducing rotational resistance. Simultaneously, the rolling of the steel ball 5 also serves an automatic self-aligning function. When the positioning ring 2 is subjected to an eccentric load, each steel ball 5 automatically adjusts the load distribution through minute rolling, ensuring stable rotation of the positioning ring 2.

[0044] The washer ring 4 is a precision ring-shaped part that has undergone quenching treatment, and its upper and lower surfaces have high hardness and smoothness. The upper washer ring is installed in the annular groove on the lower end face of the positioning ring 2, and the lower washer ring is installed in the annular groove on the upper end face of the base 1. The steel ball 5 is held between the two washer rings. The functions of the washer ring 4 are as follows: first, to provide a smooth and flat rolling contact surface and reduce rolling resistance; second, to protect the base material of the base 1 and the positioning ring 2 from being crushed or worn by the steel ball 5; and third, to ensure a uniform gap between the lower end face of the positioning ring 2 and the upper end face of the base 1 through the thickness and flatness accuracy of the washer ring, avoiding direct contact and friction between the two.

[0045] (III) Positioning ring and positioning shaft assembly The positioning ring 2 is the core load-bearing component of the entire device, which is fitted onto the positioning shaft 6 via bushing A7. Bushing A7 is interference-fitted into the central inner hole of the positioning ring 2, forming an integral assembly with the positioning ring 2. The inner hole of bushing A7 and the outer circle of the positioning shaft 6 are in a precision clearance fit, with the clearance typically ranging from 0.01mm to 0.03mm.

[0046] The functions of bushing A7 are: first, to convert the central inner hole of positioning ring 2 into a wear-resistant lining hole, so as to avoid direct contact and wear between the base material of positioning ring 2 (usually carbon structural steel) and positioning shaft 6; second, bushing A7 is made of wear-resistant copper alloy material, which has self-lubricating properties and can maintain the fitting accuracy for a long time; and third, to ensure the coaxiality of positioning ring 2 and positioning shaft 6 through the precision machining of the inner hole of bushing A7.

[0047] The positioning shaft 6 is vertically fixed on the base 1, serving as the rotation center of the positioning ring 2. After the positioning ring 2 is fitted onto the positioning shaft 6, it can rotate freely around the axis of the positioning shaft 6. The upper end face of the positioning ring 2 is a precision-machined flat surface used to support the stator ring assembly to be tested. The inner hole on the upper end face of the positioning ring 2 is used for radial positioning of the stator ring assembly, limiting the radial displacement of the assembly in the horizontal plane.

[0048] (iv) End cap The end cap 8 is fixedly installed on the upper end face of the positioning shaft 6 by screws. The bottom edge of the end cap is provided with an annular protrusion, which is inserted into the annular groove opened at the corresponding position on the upper end face of the positioning ring 2 in a clearance fit manner.

[0049] The clearance fit between the annular protrusion and the annular groove forms an axial limiting structure. When the positioning ring 2 tends to move upward under external force, the lower end face of the annular protrusion of the end cap 8 contacts the upper end face of the annular groove of the positioning ring 2, preventing the positioning ring 2 from moving further upward. Similarly, when the positioning ring 2 tends to move downward, the rolling support assembly bears the downward load. Through the combined action of the end cap 8 and the rolling support assembly, the positioning ring 2 is restricted within a defined axial position range, ensuring that the positioning ring 2 can rotate freely while preventing axial movement during rotation, thereby ensuring the repeatability and stability of the sensor's measurement position.

[0050] The gap between the annular protrusion and the annular groove ensures that the positioning ring 2 will not interfere with the end cover 8 when it rotates. At the same time, the gap is small enough to keep the axial movement within the allowable range (usually no more than 0.05 mm). In addition, the end cover 8 also has a dustproof function.

[0051] (v) Front sensor mounting assembly The front sensor mounting assembly consists of a measuring reference base 9, a rotating positioning base 10, a sensor positioning block 11, and a positioning pin 19. Its core function is to enable the front laser displacement sensor 12 to be quickly and accurately positioned between the working position and the avoidance position.

[0052] The measuring reference base 9 is fixed to the side of the base 1, and its top is precision machined to provide a precise mounting reference surface for the rotary positioning base 10. The rotary positioning base 10 is fixed to the upper surface of the measuring reference base 9, and a positioning groove is formed on it. The side of the positioning groove is precision machined to constrain the rotation axis and angular position of the sensor positioning block 11.

[0053] The sensor positioning block 11 has an L-shaped or flat support structure. One end is mounted in the positioning groove of the rotating positioning seat 10 via a pin, and can rotate around the outer pin of the rotating positioning seat 10; the other end is equipped with two front-facing laser displacement sensors 12. The sensor positioning block 11 has two predetermined working positions: Working position: The sensor positioning block 11 rotates to above the inner hole of the positioning ring 2, and the front laser displacement sensor 12 is aligned with the measuring point on the front of the blade. At this time, the positioning pin 19 is inserted into the positioning hole corresponding to the sensor positioning block 11 in the rotating positioning seat 10, locking the sensor positioning block 11. The side of the positioning groove and the positioning pin 19 together ensure the repeatability of the sensor positioning block 11 in the working position.

[0054] Clearance position: The sensor positioning block 11 is rotated 180° to the outside of the positioning ring 2, so that the space above the positioning ring 2 is completely open, which facilitates the vertical hoisting and disassembly of the stator ring assembly and avoids collision between the sensor and the workpiece.

[0055] (vi) Rear sensor mounting assembly The rear sensor mounting assembly consists of a rear sensor limiting seat 13 and a rear sensor mounting seat 14, and its function is to fix the rear laser displacement sensor 12 at a predetermined position above the inner side of the positioning ring 2.

[0056] The back-side sensor limiting seat 13 is fixed to the upper end face of the end cover 8, serving as an intermediate transition mounting component. Its height and position are precisely designed to ensure that the back-side sensor mounting seat 14 can reach the correct measurement position. The back-side sensor mounting seat 14 is fixed to the upper end of the limiting seat 13, and a back-side laser displacement sensor 12 is mounted on each of its two sides. The two sides maintain a predetermined distance from the center of the inner hole of the upper end face of the positioning ring 2.

[0057] The working principle of the back-side laser displacement sensor 12 is as follows: a laser beam is emitted from the inside of the blade flow channel (i.e., the back side of the blade) towards the blade surface, and the distance from the sensor mounting reference surface to the blade surface is measured by triangulation or time-of-flight method. When the blade undergoes welding deformation, the spatial position of the blade surface changes, and the distance value measured by the sensor changes accordingly. This change is the amount of blade deformation.

[0058] The front laser displacement sensor 12 and the back laser displacement sensor 12 are arranged radially opposite each other, simultaneously aligning with the same blade under test from the outer and inner sides of the blade flow channel, respectively. The advantage of this dual-sided synchronous measurement method is that it can simultaneously acquire distance data from the front and back sides of the blade. By combining and analyzing the two sets of data, the deformation morphology of the blade (such as bending deformation, torsional deformation, etc.) can be more comprehensively evaluated, providing richer data support for subsequent welding parameter optimization.

[0059] (vii) Angular positioning assembly and clamping assembly The angular positioning component, namely the angular positioning pin 17, is vertically mounted on the upper end face of the positioning ring 2. In use, the angular positioning pin 17 is inserted into the pre-drilled angular positioning hole on the housing of the stator ring component to be measured, thereby determining the circumferential starting position of the component on the positioning ring 2. Because there is a fixed angular correspondence between the angular positioning pin 17 and blade number 1, blade number 1 is automatically positioned at the measurement station after the component is installed.

[0060] Hook-shaped pressure plates 20 are evenly distributed circumferentially on the upper end face of the positioning ring 2, and each hook-shaped pressure plate 20 can rotate around its mounting hole. In use, the clamping end of the hook-shaped pressure plate 20 is rotated to face the center, pressing against the upper surface of the stator ring assembly housing end face. A downward locking force is applied by screws, firmly pressing the assembly against the upper end face of the positioning ring 2. The rotatable design of the hook-shaped pressure plates 20 has the advantage that when loading or unloading workpieces, the hook-shaped pressure plates 20 can be rotated 180° so that their clamping ends face outwards, avoiding the workpiece loading path and facilitating vertical loading and unloading of the workpiece.

[0061] (viii) Indexing and positioning components The indexing and positioning assembly consists of bushing B18, indexing pin 21, and angular positioning block 23. Its function is to achieve precise indexing and positioning of positioning ring 2 in the circumferential direction.

[0062] Bushings B18 are evenly distributed circumferentially in the annular hole band around the outer periphery of the positioning ring 2. Their number is the same as the number of blades in the stator ring assembly, and the number of each bushing B18 corresponds one-to-one with the number of each blade. The inner hole of the bushing B18 is precision machined to serve as the positioning hole for the indexing pin 21.

[0063] The angular positioning block 23 is fixed to the upper surface of the base 1, located outside the positioning ring 2, and has an oblong positioning groove. The indexing pin 21 has a stepped shaft structure, with a handle at the top and a positioning pin at the bottom. In use, the indexing pin 21 passes vertically from top to bottom through the inner hole of the currently numbered bushing B18 and the positioning groove of the angular positioning block 23, forming a double-point positioning constraint and locking the positioning ring 2 at the current measurement position.

[0064] Working principle: When the indexing pin 21 is pulled out, the positioning ring 2 can rotate freely; when the indexing pin 21 is inserted, the circumferential position of the positioning ring 2 is locked. Since the circumferential position of each bushing B18 precisely corresponds to the circumferential position of each blade, whenever the indexing pin 21 is inserted into a bushing B18 with a certain number, the corresponding blade is rotated to the measurement position. The operator can complete the measurement of all blades sequentially by inserting the indexing pin 21 into bushings B18 numbered 1, 2, 3...N.

[0065] The waist-shaped groove on the angular positioning block 23 has a certain length margin, which can compensate for small positional deviations when the indexing pin 21 is inserted, ensuring smooth insertion operation.

[0066] How to use the device Before using this device to measure the welding deformation of the stator ring assembly blades, the device and electrical components must be tested according to the drawings to ensure that the device is in the correct working condition.

[0067] The specific measurement steps are as follows: Step 1: Power-on initialization Turn on the power to the laser displacement sensor 12 and its display screen to put the laser displacement sensor and digital display device into working condition.

[0068] Step 2: Status Check Visually inspect whether the angular positioning pin 17 is on the left side of the sensor positioning block 11 and the distance between it and the sensor positioning block 11 is no more than 10mm; check whether the indexing pin 21 is installed in the bushing B18 hole near the serial number 1.

[0069] Step 3: Sensor avoidance (material loading preparation) Before installing the stator ring assembly, first pull out the positioning pin 19 of the rotating positioning seat 10 and the sensor positioning block 11 near the center, and rotate the sensor positioning block 11 180 degrees so that it contacts the outside of the rotating positioning seat 10.

[0070] Step 4: Install the workpiece Install the stator ring assembly in the inner hole of the upper end face of the positioning ring 2, then install the angular positioning hole of the stator ring assembly on the angular positioning pin 17, and then fit the end face of the stator ring assembly with the upper end face of the positioning ring 2, and use the hook-shaped pressure plate 20 to press the stator ring assembly onto the positioning ring 2.

[0071] Step 5: Sensor Reset Rotate the sensor positioning block 11 to the working position and insert the positioning pin 19.

[0072] Step 6: Data Reading Read the values ​​of the four sensors on the digital display device of the laser displacement sensor and record them in the table with the serial number 1 for blade.

[0073] Step 7: Indexing and indexing Pull out the indexing pin 21 installed on the positioning ring 2, use the handle 22 installed on the positioning ring 2 to rotate the bushing B18 marked 2 on the positioning ring 2 until it is aligned with the positioning groove of the angular positioning block 23 installed on the base 1, insert the indexing pin 21, and then read the value on the digital display device and record it in the table of the corresponding numbered blade.

[0074] Step 8: Cyclic Measurement Repeat step 7 above until the last blade is rotated and the measurement data is recorded.

[0075] Step 9: Data Analysis After the measurement is completed, the values ​​of each sensor are compared to identify the location and amount of deformation of the blade with large deformation, providing data support for subsequent adjustment of electron beam welding parameters.

[0076] Example In this embodiment, all components of the device for measuring the welding deformation of the stator ring assembly blades are made of metal to ensure sufficient rigidity and dimensional stability. The support frame 16 is made of welded steel profiles, and the main load-bearing components such as the base 1, positioning ring 2, and positioning shaft 6 are made of high-quality carbon structural steel.

[0077] The laser displacement sensor 12 is a high-precision laser displacement sensor with a measurement accuracy better than 0.01mm and a sampling frequency of not less than 1kHz, which can meet the accuracy requirements for measuring the welding deformation of the blade.

[0078] Both bushings A7 and B18 are made of wear-resistant copper alloy to ensure wear resistance and dimensional stability during long-term use.

[0079] The steel ball 5 is made of high-precision bearing steel ball with a diameter uniformity better than 0.005mm to ensure the stability of the positioning ring 2 during rotation.

[0080] Practical application verification has shown that using this device to measure the welding deformation of a stator ring assembly (60 blades) of a certain type of aero-engine can complete the measurement of all blades in no more than 15 minutes, while a coordinate measuring machine (CMM) would require more than 4 hours to complete the same workload. In terms of measurement accuracy, the comparison error between this device and the CMM is no more than 0.02 mm, fully meeting the requirements of engineering applications.

[0081] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for measuring the welding deformation of stator ring assembly blades, characterized in that, include: Support frame (16) is used to provide an installation base for the device; The base (1) is mounted on the support frame (16) and has an opening in the central area; The positioning shaft (6) is installed vertically in the central area of ​​the base (1); The positioning ring (2) is fitted around the positioning shaft (6) in a way that it can rotate around the positioning shaft (6) and is used to carry and drive the stationary ring assembly to be tested to rotate so as to achieve the indexing positioning of each blade. A rolling support assembly is installed between the top surface of the base (1) and the bottom surface of the positioning ring (2) to provide rolling support to the positioning ring (2); The end cap (8) is installed on the top of the positioning shaft (6), and the protrusion provided at the bottom edge is partially embedded in the groove opened in the corresponding position of the positioning ring (2) in a clearance fit manner, which can limit the axial position of the positioning ring (2) relative to the positioning shaft (6). The front sensor mounting assembly is installed on the outside of the positioning ring (2) and fixed on the base (1) for mounting the front laser displacement sensor (12) and positioning the front laser displacement sensor (12) to a predetermined measurement position. The front laser displacement sensor (12) is used to measure the displacement of the blade surface from the front. The back sensor mounting assembly is installed on the inner side of the positioning ring (2) and fixed on the end cap (8) for mounting the back laser displacement sensor (12) and positioning the back laser displacement sensor (12) to a predetermined measurement position. The back laser displacement sensor (12) is used to measure the displacement of the blade surface from the back. The front laser displacement sensor and the back laser displacement sensor are respectively aligned with the same blade from the radially opposite sides of the positioning ring (2) to synchronously acquire the front distance data and back distance data of the blade. An angular positioning component is installed on the upper end face of the positioning ring (2) near the edge of the inner hole, and is used to cooperate with the angular positioning hole of the stationary ring component to be tested to achieve angular positioning; A clamping assembly is installed on the upper end face of the positioning ring (2) to clamp and fix the stationary ring assembly to be tested onto the positioning ring (2); The indexing and positioning component is installed between the outer periphery of the positioning ring (2) and the base (1) to achieve indexing locking when the positioning ring (2) rotates to the measurement position of each blade; A handle (22) is installed on the outer periphery of the positioning ring (2) for the operator to rotate the positioning ring (2).

2. The device for measuring the welding deformation of stator ring assembly blades according to claim 1, characterized in that, The rolling support component includes, The spacer ring (3) is installed in the annular groove on the upper end face of the base (1) to separate and maintain the circumferential position of each steel ball (5); Steel balls (5) are placed in the hole of the spacer ring (3) to act as rolling elements to reduce the frictional resistance when the positioning ring (2) rotates; The pad rings (4) are respectively installed between the upper end of the steel ball (5) and the bottom surface of the annular groove of the lower end face of the positioning ring (2), and between the lower end of the steel ball (5) and the bottom surface of the annular groove of the upper end face of the base (1), which can transmit load and protect the contact surface of the steel ball (5).

3. The device for measuring the welding deformation of stator ring assembly blades according to claim 1, characterized in that, The front sensor mounting assembly includes, A measuring reference seat (9) is installed on the side of the base (1) to provide an installation reference for the rotary positioning seat (10); A rotating positioning seat (10) is installed on the upper end face of the measuring reference seat (9) to provide a rotating support and positioning groove for the sensor positioning block (11). The sensor positioning block (11) has a working position and a clearance position, and is installed in the positioning groove of the rotating positioning seat (10) to install the front laser displacement sensor (12) and rotate and switch between the working position and the clearance position. The positioning pin (19) is used to lock the sensor positioning block (11) in the working position or the clearance position; In the working position, the sensor positioning block (11) is located above the inner hole of the positioning ring (2) to align with the front of the blade. In the clearance position, the sensor positioning block (11) rotates to the outside of the positioning ring (2) to make room for the installation of the stator ring assembly.

4. The device for measuring the welding deformation of stator ring assembly blades according to claim 1, characterized in that, The rear sensor mounting assembly includes... The back-side sensor limiting seat (13) is installed on the upper end face of the end cover (8) to provide a mounting base for the back-side sensor mounting seat (14); The back-side sensor mounting base (14) is installed on the upper end of the back-side sensor limiting base (13) for mounting the back-side laser displacement sensor (12), which is located above the central area of ​​the positioning ring (2), and its two sides are kept at a predetermined distance from the center of the inner hole of the upper end face of the positioning ring (2) for positioning the back-side laser displacement sensor (12) at the measurement position aligned with the back of the blade.

5. The apparatus for measuring the welding deformation of stator ring assembly blades according to claim 1, characterized in that, The indexing and positioning component includes, Bushings B (18) are evenly distributed in the annular hole band around the outer periphery of the positioning ring (2). Each bushing B (18) corresponds to each blade number and is used to provide positioning holes for the indexing pin (21). An angular positioning block (23) is installed on the upper end face of the base (1) and located outside the positioning ring (2), and has a positioning groove for cooperating with the indexing pin (21) to limit the rotation angle of the positioning ring. The indexing pin (21) passes vertically through the hole of the bushing B (18) and extends into the positioning groove of the angular positioning block (23) to lock the positioning ring (2) at the current blade measurement position.

6. The apparatus for measuring the welding deformation of stator ring assembly blades according to claim 1, characterized in that, The angular positioning assembly includes an angular positioning pin (17), which is vertically mounted on the upper end face of the positioning ring (2) and is used to insert into the angular positioning hole of the stationary ring assembly to be tested to determine the initial installation angle of the workpiece on the positioning ring (2). The angular positioning pin (17) is located on the left side of the sensor positioning block (11) and the distance between it and the sensor positioning block (11) is no more than 10mm, which can prevent interference with the sensor positioning block (11) when the sensor positioning block (11) is in the working position.

7. The apparatus for measuring the welding deformation of stator ring assembly blades according to claim 1, characterized in that, The clamping assembly is a hook-shaped clamping plate (20). The hook-shaped clamping plates (20) are distributed circumferentially on the upper end face of the positioning ring (2). Each hook-shaped clamping plate (20) can rotate around its mounting hole. The clamping end points to the center of the positioning ring (2) and is used to clamp the stationary ring assembly to be tested onto the upper end face of the positioning ring (2).

8. The apparatus for measuring the welding deformation of stator ring assembly blades according to claim 1, characterized in that, It also includes bushing A (7), which is interference-fitted into the central inner hole of the positioning ring (2) to convert the central inner hole of the positioning ring (2) into a wear-resistant lining hole, wherein, The inner hole of the bushing A (7) and the outer circle of the positioning shaft (6) are in clearance fit to ensure that the positioning ring (2) is coaxially installed and rotates flexibly relative to the positioning shaft (6).

9. The apparatus for measuring the welding deformation of stator ring assembly blades according to claim 1, characterized in that, The front laser displacement sensor (12) and the back laser displacement sensor (12) are arranged opposite each other in the radial direction, and are simultaneously aligned with the front and back sides of the same blade from the outside and inside sides of the blade flow channel, respectively, to synchronously acquire the front distance data and back distance data of the blade.

10. A method for measuring the welding deformation of a stator ring assembly blade using the apparatus described in any one of claims 1 to 9, characterized in that, Includes the following steps: Rotate the sensor positioning block (11) to the clearance position, install the stationary ring assembly to be tested, and achieve angular positioning by the cooperation of the angular positioning pin (17) and the angular positioning hole of the workpiece. Press the workpiece against the upper end face of the positioning ring (2) by the hook-shaped pressure plate (20). Rotate the sensor positioning block (11) to the working position and insert the positioning pin (19) to lock it, so that the front laser displacement sensor (12) moves to the measurement position; Read and record the measurement values ​​of the front and rear laser displacement sensors; Pull out the indexing pin (21), rotate the positioning ring (2) through the handle (22) to rotate the next numbered bushing B (18) to align with the positioning groove of the angular positioning block (23), insert the indexing pin (21) to lock the positioning ring, and read and record the sensor value corresponding to the current blade. Repeat the above steps of indexing rotation and reading until all blades have been measured.

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