Method for removing plasma impact absorption layer of blade disc

Abstract

The invention relates to a method for removing a plasma impact absorbing layer of a blade disc. The method comprises the following steps: step 1, clamping a blade disc part; step 2, setting light emitting; 3, adjusting the spatial position of the blade disc; 4, setting process parameters, wherein the laser cleaning process parameters comprise power, frequency, light spot diameter and scanning speed; 5, the blade disc is rotationally fed; 6, laser cleaning is conducted; step 7, surface changing and cleaning; step 8, runner cleaning; step 9, supplementary cleaning; step 10, cleaning the parts; by means of the method, the removal efficiency is greatly improved, the labor intensity of workers is reduced, and the first-pass yield of leaf disc absorption layer removal is improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser cleaning processes, and in particular to a method for removing a plasma shock absorption layer of a blade disk. Background Art

[0002] Laser cleaning is to irradiate a high-energy-density laser beam onto the surface of the object being cleaned, and remove pollutants on the surface of the object through vibration, decomposition, and gasification to achieve a cleaning effect. The technology is based on outstanding advantages such as green, good cleaning effect, wide application range, high precision, non-contact and good accessibility. It is in sharp contrast with cleaning agents, ultrasonic and mechanical cleaning methods. In the future, it is expected to partially or completely replace traditional cleaning methods and become the green cleaning technology with the most development potential in the 21st century.

[0003] The blade disk eliminates the traditional connection structure and integrates the engine rotor blades and the wheel disk, which greatly simplifies the engine structure and effectively improves the aerodynamic efficiency. The blade edge of the blade disk adopts plasma strengthening technology to enhance the blade's ability to resist damage from foreign objects and ensure the safety of the blade disk in service.

[0004] Plasma strengthening uses a high-energy pulsed laser beam to pass through the confinement layer to radiate the surface absorption layer of the part, generating a large amount of high-temperature and high-pressure plasma, which then explodes to form a shock wave, which acts on the surface of the part to produce plastic deformation to achieve surface strengthening. The absorption layer is often manually pasted with black tape. In order to improve the efficiency of the absorption layer layout, the spraying method is gradually promoted and used, which greatly improves the efficiency compared to manual pasting. In addition to the strengthening area, the spraying area should also be sprayed with suction near the area to play a protective role. The removal of the sprayed absorption layer is the same as the traditional black tape, which is manually torn off. The difference between the sprayed absorption layer and the traditional black tape is that it cannot be torn off as a whole like a tape. In particular, the spatial structure of the blade disk is complex, and the sprayed absorption layer is easy to break and leave residue when torn off manually. It is particularly difficult to remove, which seriously affects production efficiency. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a method for removing the plasma shock absorption layer of a blade disk; the specific technical solution is as follows:

[0006] A method for removing a plasma shock absorbing layer of a blade disk comprises the following steps:

[0007] Step 1: Clamp the blade disk parts by using a robot;

[0008] Step 2: Light output setting, wherein the light output setting is a laser scanning mode;

[0009] Step 3: Adjust the spatial position of the blade disk. The spatial position of the blade disk is adjusted by adjusting the posture so that the laser can irradiate the surface to be cleaned. Specifically, it involves the relative position of the blade disk and the laser vector direction in space.

[0010] Step 4: Set process parameters. Laser cleaning process parameters include power, frequency, spot diameter, and scanning speed.

[0011] Step 5: The blade disk rotates and feeds. The blade disk rotates by rotating around the center of rotation. The feed is along the laser vector direction. When the laser feeds to the edge of the blade, it feeds in the reverse direction, and repeats this process.

[0012] Step 6: Laser cleaning, start the laser to start scanning, and in the motion state of the blade disc rotating and feeding in step 5, the absorption layer begins to peel off in layers, and this process is repeated until the absorption layer on the surface to be cleaned is completely removed;

[0013] Step 7: Change the surface for cleaning. The surface is changed from the air intake surface to the exhaust surface, which is achieved by a robot. Laser cleaning is performed according to step 6.

[0014] Step 8: Cleaning the flow channel. The flow channel is located in the body of the blade disk, between the roots of two blades. Adjust the posture of the blade disk so that the flow channel is exposed to the laser irradiation range, and then clean it.

[0015] Step 9: Re-cleaning: if there is any absorption layer left after cleaning, adjust the blade disk posture to remove the remaining absorption layer by laser irradiation;

[0016] Step 10: Clean the parts to remove particles attached to the coating surface.

[0017] The preferred embodiment of the method for removing the plasma shock absorption layer of a blade disk is as follows: in step 1, when clamping, ensure that the blade disk has enough room to flip and no interference occurs.

[0018] The preferred embodiment of the method for removing the plasma shock absorption layer of a blade disk is that in step 2, a line scanning method is adopted, the scanning direction is along the blade span direction, and the scanning length is controlled based on the blade length.

[0019] The preferred embodiment of the method for removing the plasma shock absorption layer of a blade disk is that in step 5, the rotation speed of the blade disk is controlled to be 5-10 r / min, and the laser vector direction feed speed is 1-3 mm / min.

[0020] The preferred embodiment of the method for removing the plasma shock absorption layer of a blade disk is that in step 6, the laser cleaning process parameters are: power 60W, frequency 270KHz, spot diameter 0.115mm, and scanning speed 12000mm / s.

[0021] The preferred embodiment of the method for removing the plasma shock absorption layer of a blade disk is that in step 10, compressed air is used to clean the parts.

[0022] Compared with the prior art, the present invention has the following beneficial technical effects:

[0023] The technical solution of the present invention solves the problem of serious residual and incomplete removal of the original sprayed absorption layer. Compared with the manual tearing method, it can effectively avoid the residual of the sprayed absorption layer and ensure the removal quality of the blade disk absorption layer. This method greatly improves the removal efficiency, reduces the labor intensity of workers, and improves the first-time pass rate of the blade disk absorption layer removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a leaf disk;

[0025] Figure 2 Schematic diagram of the leaf.

[0026] In the figure: 1-inlet side, 2-exhaust side, 3-flow channel. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-2 The present invention is described in detail, but the protection scope of the present invention is not limited by the accompanying drawings.

[0028] A method for removing a plasma shock absorbing layer of a blade disk, the specific steps are as follows:

[0029] Step 1: Clamping of blade disk parts; the parts clamping is realized by a manipulator, and at the same time, it is ensured that the blade disk has enough space for turning and no interference occurs;

[0030] Step 2: light output setting; the light output setting is a laser scanning mode, specifically a line scanning mode, the scanning direction is along the leaf span direction, and the scanning length is controlled based on the leaf length;

[0031] The scanning length is set to be 3mm-5mm greater than the blade length.

[0032] Step 3: Adjusting the spatial position of the blade disk; the purpose of adjusting the spatial position of the blade disk is to enable the laser to irradiate the surface to be cleaned through posture adjustment, which specifically involves the relative spatial position of the blade disk and the laser vector direction.

[0033] By adjusting the angle between the air inlet surface of the blade disk and the laser vector direction, ensure that the blade basin and the back surface to be cleaned are exposed to the laser irradiation range, and at the same time ensure that the laser scanning direction is the blade span direction, and the minimum distance between the laser vector direction and the blade is the focal length.

[0034] Step 4: Set process parameters; the laser cleaning process parameters are: power 60W, frequency 270KHz, spot diameter 0.115mm, scanning speed 12000mm / s.

[0035] Step 5: Rotational feeding of the blade disk; the rotation of the blade disk is self-rotation around the center of rotation, and the feeding is along the laser vector direction. When the laser feeds to the edge of the blade, the blade disk is fed in the reverse direction, and the process is repeated.

[0036] The rotation speed is controlled at 8r / min, and the laser vector direction feed speed is 2mm / min.

[0037] Step 6: Laser cleaning: Start the laser to start scanning. In the motion state of step 5, the absorption layer begins to peel off in layers, and this process is repeated until the absorption layer of the surface to be cleaned is completely removed.

[0038] Step 7: Change the surface and clean it; the surface is changed from the air inlet surface 1 to the exhaust surface 2, which is achieved by a robot and laser cleaned according to step 6.

[0039] Step 8: Flow channel cleaning: The flow channel 3 is located in the disk body, between the roots of two blades. The blade disk posture is adjusted to expose the flow channel to the laser irradiation range.

[0040] In this embodiment, the direction of the laser vector is controlled to be close to the leaf span direction, and the distance from the flow channel to the light-emitting mirror is the focal length.

[0041] Step 9: Re-cleaning: If there is any absorption layer left after cleaning, the blade disk posture can be adjusted to remove the remaining absorption layer by laser irradiation.

[0042] In this embodiment, the distance from the cleaning portion to the light-emitting mirror is controlled to be the focal length.

[0043] Step 10: Parts cleaning: Compressed air is used to remove particles attached to the coating surface.

[0044] The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of patent protection of the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any equivalent implementation or change that does not depart from the present invention is included in the patent scope of this case.

Claims

1. A method for removing a plasma shock absorbing layer of a blade disk, characterized in that: The steps include: Step 1: Clamp the blade disk parts by using a robot; Step 2: Light output setting, wherein the light output setting is a laser scanning mode; Step 3: Adjust the spatial position of the blade disk. The spatial position of the blade disk is adjusted by adjusting the posture so that the laser can irradiate the surface to be cleaned. Specifically, it involves the relative position of the blade disk and the laser vector direction in space. Step 4: Set process parameters. Laser cleaning process parameters include power, frequency, spot diameter, and scanning speed. Step 5: The blade disk rotates and feeds. The blade disk rotates by rotating around the center of rotation. The feed is along the laser vector direction. When the laser feeds to the edge of the blade, it feeds in the reverse direction, and repeats this process. Step 6: Laser cleaning, start the laser to start scanning, and in the motion state of the blade disc rotating and feeding in step 5, the absorption layer begins to peel off in layers, and this process is repeated until the absorption layer on the surface to be cleaned is completely removed; Step 7: Change the surface for cleaning. The surface is changed from the air intake surface to the exhaust surface, which is achieved by a robot. Laser cleaning is performed according to step 6. Step 8: Cleaning the flow channel. The flow channel is located in the body of the blade disk, between the roots of two blades. Adjust the posture of the blade disk so that the flow channel is exposed to the laser irradiation range, and then clean it. Step 9: Re-cleaning: if there is any absorption layer left after cleaning, adjust the blade disk posture to remove the remaining absorption layer by laser irradiation; Step 10: Clean the parts to remove particles attached to the coating surface.

2. The method for removing the plasma shock absorbing layer of a blade disk according to claim 1, characterized in that: In step 1, ensure that the blade disk has enough room to flip when clamping, and no interference occurs.

3. The method for removing the plasma shock absorbing layer of a blade disk according to claim 1, characterized in that: In step 2, a line scanning method is adopted, the scanning direction is along the leaf span direction, and the scanning length is controlled based on the blade length.

4. The method for removing the plasma shock absorption layer of a blade disk according to claim 1, characterized in that: In step 5, the rotation speed of the blade disk is controlled to be 5-10 r / min, and the feed speed in the laser vector direction is 1-3 mm / min.

5. The method for removing the plasma shock absorbing layer of a blade disk according to claim 1, characterized in that: In step 6, the laser cleaning process parameters are: power 60 W, frequency 270 KHz, spot diameter 0.115 mm, and scanning speed 12000 mm / s.

6. The method for removing the plasma shock absorption layer of a blade disk according to claim 1, characterized in that: In step 10, the parts are cleaned using compressed air.

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