A coordinate measuring machine method for measuring the dimensions of a double-layer integral bladed disk.

Abstract

This invention belongs to the field of integral bladed disk size detection technology, and provides a three-coordinate measuring machine (TCM) method for detecting the dimensions of a double-layer integral bladed disk. The method includes the following steps: Step 1, designing the TCM probe structure based on the disk structure; Step 2, configuring the calibration ball orientation for the probe structure; Step 3, calibrating all probes and placing them in the probe replacement rack; Step 4, establishing the disk coordinate system; Step 5, automatically running the program and calling the corresponding probes to scan the disk profile; Step 6, using the scanned data for dimensional evaluation. This invention efficiently completes the detection of the double-layer integral bladed disk profile, avoids missing disk dimensions, achieves quality control, improves measurement efficiency and accuracy, and increases detection efficiency by 50%.

Description

Technical Field

[0001] This invention belongs to the field of integral bladed disk size detection technology, specifically relating to a three-coordinate detection method for the size of a double-layer integral bladed disk. Background Technology

[0002] The double-layer integral bladed disk of an aero-engine is a rotor component consisting of two integral bladed disks connected as one unit. Its disk body is double-layered and features a deep internal cavity structure, multiple transition fillets, curved spokes, and an external "Ω" blind slot. It is characterized by its confined space, mutual obstruction, suspended inspection area, and numerous inspection dimensions.

[0003] Traditional top-down inspection methods cannot detect suspended surfaces and internal curved areas, so there is an urgent need for a method that can complete the inspection of all the profiles of the disc in one clamping. Summary of the Invention

[0004] The purpose of this invention is to provide a coordinate measuring machine (CMM) method for detecting the dimensions of a double-layer integral bladed disk, which can efficiently detect the disk profile and narrow cavity, avoid missing disk dimensions, achieve quality control, and improve measurement efficiency and accuracy.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A coordinate measuring machine method for measuring the dimensions of a double-layer integral bladed disk includes the following steps:

[0007] Step 1: Complete the design of the coordinate measuring machine stylus structure based on the disk structure.

[0008] The double-layer integral bladed disk features a deep cavity structure at its center, multiple rounded corners on each surface, curved spokes, and an external "Ω" blind groove. Based on these features, the probe structure is designed to ensure probe reachability.

[0009] Step 2: Configure the calibration ball orientation for the probe structure.

[0010] Since the probe d's ball is tilted upwards, its ball rod will interfere with and collide with the support rod of the vertical calibration ball, making calibration impossible. Therefore, a horizontal calibration ball needs to be configured for probe d.

[0011] A vertical calibration ball needs to be configured for probes a, b, c, and e;

[0012] Step 3: Calibrate all probes and place them in the probe changing rack.

[0013] Based on the disc structure of the double-layer integral bladed disk, multiple probe structures need to be configured and placed in the probe changing rack of the measuring equipment to realize continuous automatic probe changing and continuous measurement.

[0014] Step 4: Establish the disk coordinate system

[0015] Establish a coordinate system using the reference plane and the central reference circle.

[0016] Step 5: The program runs automatically, calling the corresponding probes to scan the disk's profile.

[0017] Based on the cross-sectional dimensions of the part, different probes are configured; suitable probes and angles are selected to program the scan. The angle set for each probe enables the scanning programming of the disk dimensions of a part. Through the cooperation of multiple probes, the scanning programming of the entire part, the entire disk, and the entire area is finally achieved.

[0018] The program runs automatically and scans and measures the disk dimensions according to the corresponding probes called by the program.

[0019] Step 6: Use the scanned data to evaluate the dimensions.

[0020] Using the scan data obtained in step 5, straight line, circle and point features are constructed, and the size of these features is automatically evaluated.

[0021] The probes include five types: probe a, probe b, probe c, probe d, and probe e.

[0022] The probe a includes a suction cup, and the suction cup connection end is connected to the end of the probe body of the ball.

[0023] The probe b includes a suction cup, the suction cup connection end of which is connected to one end of an extension rod, and the other end of the extension rod is connected to the end of the probe body of the probe ball through a five-way connector, and the probe ball and the extension rod are arranged at 90°.

[0024] The difference between probe c and probe b is that the length of the probe ball rod in probe c is longer than the length of the probe ball rod in probe b.

[0025] The probe d includes a suction cup. The suction cup connection end is connected to one end of a vertical extension rod. The other end of the vertical extension rod is connected to one end of a horizontal extension rod through a five-way connector. The other end of the horizontal extension rod is connected to the end of the probe body of the probe ball through a probe joint. The probe ball and the suction cup are located at the same end and are tilted to the upper right.

[0026] The difference between probe e and probe d is that the probe ball of probe e is positioned away from the suction cup and is tilted to the lower right.

[0027] The technical effects of this invention are as follows:

[0028] This invention utilizes a three-coordinate measuring stylus structure design to achieve continuous and automatic program operation, efficiently completing the detection of the double-layer integral bladed disk profile, including narrow cavities, avoiding disc size omissions, achieving quality control, and improving measurement efficiency and accuracy. It increases detection efficiency by 50%. Attached Figure Description

[0029] Figure 1 Schematic diagram of a double-layer integral bladed disk according to the present invention;

[0030] Figure 2 The present invention relates to the body profile of a double-layer integral bladed disk;

[0031] Figure 3 This is a schematic diagram of the installation of the rotating probe base and probe a;

[0032] Figure 4 Schematic diagrams of different probe structures of the present invention; Figure 4 a represents the probe a; Figure 4 b represents the probe b; Figure 4 c represents the probe c; Figure 4 d represents the probe d; Figure 4 e represents the probe e;

[0033] Figure 5 Five angles and measurement areas for probe a;

[0034] Figure 6 The probe b has three angles and a measurement area;

[0035] Figure 7 Two angles for the probe and the measurement area;

[0036] Figure 8 Two angles for the probe d and the measurement area;

[0037] Figure 9 An angle and measurement area for the probe e;

[0038] Figure 10 To ensure the calibrator is positioned vertically and horizontally;

[0039] Figure 11 Calibrate the probe d using a horizontal measuring ball;

[0040] 1-Rotating probe base, 2-Probe a, 3-Suction cup, 4-Extension rod, 5-Five-way connector, 6-Probe joint, 7-Probe ball. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0042] A coordinate measuring machine method for measuring the dimensions of a double-layer integral bladed disk includes the following steps:

[0043] Step 1: Complete the design of the coordinate measuring machine stylus structure based on the disk structure.

[0044] Figure 1 This is a schematic diagram of a double-layer integral bladed disk. Figure 2 The cross-sectional disk profile is taken as the target to be measured; the double-layer integral bladed disk has a deep cavity structure at the center, multiple transition rounded corners on each surface, curved spokes, and external "Ω" blind groove features; based on the above features, the probe structure is designed to achieve probe reachability;

[0045] The probe can be assembled into different structures, and the probe is connected to the rotating probe base 1 through the suction cup 3 on it.

[0046] like Figures 4 to 9 The diagram shows the specific structure of the probe, as well as the corresponding angles and measurement areas.

[0047] The probe a2 includes a suction cup 3, the connecting end of which is connected to the end of the rod of the probe ball 7. Measurement is completed by the probe ball 7 contacting the measuring part of the part.

[0048] Figure 3 This is a schematic diagram of a specific example of the cooperation between the rotating probe base and the probe a2; the probe a2 is mounted on the connecting end of the rotating probe base 1 via the suction cup 3. The rotating probe base 1 has two adjustment modes: horizontal rotation and pitch; the pitch angle A and the horizontal rotation angle B are adjusted according to the instructions based on the settings of the rotating probe base 1. The probe and angle configuration are shown in Table 1.

[0049] The probe b includes a suction cup 3. The end of the suction cup 3 is connected to one end of the extension rod 4. The other end of the extension rod 4 is connected to the end of the probe ball 7 via a five-way connector 5. The probe ball 7 and the extension rod 4 are arranged at 90°.

[0050] The difference between probe c and probe b is that the length of the probe ball 7 in probe c is longer than the length of the probe ball 7 in probe b.

[0051] The probe d includes a suction cup 3. The connecting end of the suction cup 3 is connected to one end of the vertical extension rod 4. The other end of the vertical extension rod 4 is connected to one end of the horizontal extension rod 4 through a five-way connector 5. The other end of the horizontal extension rod 4 is connected to the end of the rod of the probe ball 7 through a probe joint 6. The probe ball 7 and the suction cup 3 are located at the same end and are tilted to the upper right. The probe joint 6 allows for adjustment of the probe ball 7 at any angle.

[0052] The difference between probe e and probe d is that the probe ball 7 of probe e is positioned away from the suction cup 3, and the probe ball 7 is tilted to the lower right.

[0053] The above five probes and angles can be used to measure all areas of the profile of the double-layer integral bladed disk.

[0054] See Table 1

[0055]

[0056] Step 2: Configure the calibration ball orientation according to the probe structure

[0057] Because the probe ball 7 of the probe d is tilted upwards, its rod will interfere with and collide with the support rod of the vertical calibration ball, making calibration impossible. Therefore, a horizontal calibration ball needs to be configured for the probe d, such as... Figure 10 and Figure 11 As shown;

[0058] A vertical calibration ball needs to be configured for probes a2, b, c and e;

[0059] Step 3: Calibrate all probes and place them in the probe changing rack.

[0060] By placing probes a2 to e into the probe changing frame of the coordinate measuring machine, continuous automatic probe changing and continuous measurement can be achieved, avoiding interruption of the program operation by manual probe changing;

[0061] Step 4: Establish the disk coordinate system

[0062] Establish a coordinate system using the reference plane and the central reference circle;

[0063] Step 5: The program runs automatically, calling the corresponding probes to scan the disk body profile.

[0064] Based on the cross-sectional dimensions of the part, different probes are configured, and 13 angle settings are achieved by using five types of probes in conjunction with an automatic probe holder. The appropriate probe and angle are selected to program the scanning of the disk dimensions of the part. Through the combination of multiple probes, the scanning of the entire disk and all areas of the entire part is finally achieved.

[0065] The program runs automatically and scans and measures the disk dimensions according to the corresponding probes called by the program.

[0066] Step 6: Use the scanned data to evaluate dimensions.

[0067] Using the scan data obtained in step 5, straight lines, circles, and points are constructed, and the dimensions of these features are automatically evaluated using a coordinate measuring machine.

Claims

1. A coordinate measuring machine method for detecting the dimensions of a double-layer integral bladed disk, characterized in that, Includes the following steps: Step 1: Complete the design of the coordinate measuring stylus structure based on the disk structure; Step 2: Configure the calibration ball orientation for the probe structure; Step 3: Calibrate all probes and place them in the probe replacement rack; Based on the disc structure of the double-layer integral bladed disk, multiple probe structures need to be configured and placed in the probe changing rack of the measuring equipment to realize continuous automatic probe changing and continuous measurement. Step 4: Establish the disk coordinate system; Establish a coordinate system using the reference plane and the central reference circle; Step 5: The program runs automatically, calling the corresponding probes to scan the disk body profile. Step 6: Use the scanned data to evaluate the dimensions; Using the scan data obtained in step 5, construct straight line, circle and point features, and automatically evaluate the size of the above features; Step 1 specifically involves: the double-layer integral bladed disk has a deep cavity structure at its center, multiple rounded corners on each surface, curved spokes, and an external "Ω" blind groove feature; the probe structure is designed based on the above features to achieve probe reachability. The probes mentioned in step 1 include five types: probe a, probe b, probe c, probe d, and probe e. The probe a includes a suction cup, and the suction cup connection end is connected to the end of the probe body of the ball. The probe b includes a suction cup, the suction cup connection end of which is connected to one end of an extension rod, and the other end of the extension rod is connected to the end of the probe body of the probe ball through a five-way connector, and the probe ball and the extension rod are arranged at 90°. The difference between probe c and probe b is that the length of the probe ball rod in probe c is longer than the length of the probe ball rod in probe b. The probe d includes a suction cup. The suction cup connection end is connected to one end of a vertical extension rod. The other end of the vertical extension rod is connected to one end of a horizontal extension rod through a five-way connector. The other end of the horizontal extension rod is connected to the end of the probe body of the probe ball through a probe joint. The probe ball and the suction cup are located at the same end and are tilted to the upper right. The difference between probe e and probe d is that the probe ball of probe e is positioned away from the suction cup and is tilted to the lower right.

2. The coordinate measuring machine method for detecting the dimensions of a double-layer integral bladed disk according to claim 1, characterized in that: Step 2 specifically involves the following: Since the probe d's ball is tilted upwards, its ball rod will interfere with and collide with the support rod of the vertical calibration ball, making calibration impossible. Therefore, a horizontal calibration ball needs to be configured for the probe d. A vertical calibration ball needs to be configured for probes a, b, c, and e.

3. The coordinate measuring machine method for detecting the dimensions of a double-layer integral bladed disk according to claim 1, characterized in that: Step 5 specifically involves: configuring different probes according to the cross-sectional dimensions of the part; selecting suitable probes and angles to program the scan of the disk dimensions of the part by setting the angle of each probe; and finally achieving the scan of the entire disk and all areas of the entire part through the cooperation of multiple probes. The program runs automatically and scans and measures the disk dimensions according to the corresponding probes called by the program.

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