A method for removing a bladed disk plasma impact absorption layer

Abstract

The application relates to a removal method of a vane disc plasma impact absorption layer, which comprises the following steps: step 1, clamping the vane disc part; step 2, light output setting; step 3, adjusting the spatial position of the vane disc; step 4, setting process parameters, the laser cleaning process parameters including power, frequency, spot diameter and scanning speed; step 5, vane disc rotation feeding; step 6, laser cleaning; step 7, surface replacement cleaning; step 8, flow channel cleaning; step 9, supplementary cleaning; and step 10, part cleaning. The method greatly improves the removal efficiency, reduces the labor intensity of workers and improves the one-time qualified rate of the vane disc absorption layer removal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser cleaning process, in particular to a method for removing plasma impact absorption layer of a bladed disk. BACKGROUND

[0002] Laser cleaning is a method of irradiating a high-energy-density laser beam onto the surface of an object to be cleaned, and through vibration, decomposition, and vaporization effects, the contaminants on the surface of the object are removed to achieve cleaning. This technology has the advantages of being green, having good cleaning effect, wide application range, high precision, non-contact, and good accessibility, and is in sharp contrast to cleaning agents, ultrasonic and mechanical cleaning methods. It is expected to partially or completely replace traditional cleaning methods and become the most promising green cleaning technology in the 21st century.

[0003] The bladed disk eliminates the traditional connecting structure, integrates the engine rotor blade and the disk, greatly simplifies the engine structure, and effectively improves the aerodynamic efficiency. The bladed disk uses plasma strengthening technology on the edge of the blade to improve the ability of the blade to resist foreign matter damage and ensure the safety of the bladed disk in service.

[0004] Plasma strengthening uses a high-energy pulsed laser beam to pass through a constraint layer to irradiate the surface absorption layer of a part, generate a large amount of high-temperature and high-pressure plasma, and then form an explosion shock wave to act on the surface of the part to produce plastic deformation and achieve surface strengthening. The absorption layer is usually manually pasted with black tape. In order to improve the arrangement efficiency of the absorption layer, the spraying method is gradually popularized, which greatly improves the efficiency compared with manual pasting. In addition to the strengthening area, the spraying area near the area also needs to be sprayed with absorption to play a protective role. The removal of the sprayed absorption layer is the same as the traditional black tape, which is removed manually. The sprayed absorption layer is different from the traditional black tape, which cannot be removed like a tape. Especially for the bladed disk with complex spatial structure, the manually removed sprayed absorption layer is easy to break and leave residues, making the removal particularly difficult and seriously affecting the production efficiency. SUMMARY

[0005] To solve the above technical problems, the present application provides a method for removing the plasma impact absorption layer of a bladed disk.

[0006] A method for removing the plasma impact absorption layer of a bladed disk, comprising the following steps:

[0007] Step 1: clamping the bladed disk part, and clamping the part by a mechanical hand;

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

[0009] Step 3: adjusting the spatial position of the bladed disk, adjusting the spatial position of the bladed disk by adjusting the posture, so that the laser can irradiate the surface to be cleaned, and the spatial relative position of the bladed disk and the laser vector direction is particularly involved.

[0010] Step 4: Set the process parameters, the laser cleaning process parameters include power, frequency, spot diameter, scanning speed;

[0011] Step 5: The blade disc rotates and feeds, the blade disc rotates and feeds by rotating around the center of rotation, and the feeding is in the direction of the laser vector, and when the laser feeds to the edge of the blade, the feeding is reversed, and the reciprocation is realized;

[0012] Step 6: Laser cleaning, start the laser to begin scanning, in the motion state of the blade disc rotating and feeding in step 5, the absorption layer begins to separate layer by layer, and the reciprocation is realized until the absorption layer on the surface to be cleaned is completely removed;

[0013] Step 7: Surface cleaning, the surface is changed from the inlet surface to the outlet surface, the change is realized by a mechanical hand, and the laser cleaning is carried out according to step 6;

[0014] Step 8: Flow channel cleaning, the flow channel is located on the disc body of the blade disc and is located between the roots of two blades; the posture of the blade disc is adjusted so that the flow channel is exposed to the laser irradiation range, and then the cleaning is carried out;

[0015] Step 9: Supplementary cleaning, if there is residual absorption layer after the cleaning, the posture of the blade disc is adjusted so that the laser irradiation removes the residual absorption layer;

[0016] Step 10: Part cleaning, remove the particles attached to the surface of the coating.

[0017] The preferred scheme of the method for removing the absorption layer by the plasma impact of the blade disc is that, in step 1, when clamping, it is ensured that the blade disc has enough space to turn over and does not interfere.

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

[0019] The preferred scheme of the method for removing the absorption layer by the plasma impact of the blade disc is that, in step 5, the rotating speed of the blade disc is controlled to be 5-10 r / min, and the feeding speed in the direction of the laser vector is 1-3 mm / min.

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

[0021] The preferred scheme of the method for removing the absorption layer by the plasma impact of the blade disc is that, in step 10, the cleaning of the part adopts compressed air.

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

[0023] The technical scheme of the present application solves the problems of serious residual and incomplete removal of the original sprayed absorption layer, and compared with the manual tearing method, can effectively avoid the residual of the sprayed absorption layer and guarantee the removal quality of the absorption layer of the blade disc. The method greatly improves the removal efficiency, reduces the labor intensity of workers and improves the first-time qualified rate of the absorption layer removal of the blade disc. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is a schematic view of a blade disc;

[0025] Fig. 2 is a schematic view of a blade.

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

[0027] The present application will be described in detail below with reference to the accompanying drawings. Figs. 1-2 The present application will be described in detail below with reference to the accompanying drawings.

[0028] A method for removing a plasma impact absorption layer of a blade disc, the specific steps being as follows:

[0029] Step 1: clamping of the blade disc part; the part clamping is realized by a mechanical hand, while ensuring that the blade disc has enough space for turning over and does not interfere;

[0030] Step 2: light output setting; the light output setting is in the form of laser scanning, specifically in the form of line scanning, the scanning direction being along the blade span direction, and the scanning length being controlled based on the length of the blade;

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

[0032] Step 3: adjustment of the spatial position of the blade disc; the purpose of the adjustment of the spatial position of the blade disc is to enable the laser to irradiate the surface to be cleaned by adjusting the posture, and specifically relates to the relative spatial position of the blade disc and the direction of the laser vector.

[0033] By adjusting the angle between the inlet face of the blade disc and the direction of the laser vector, it is ensured that the surfaces to be cleaned of the blade basin and the blade back are exposed to the laser irradiation range, while it is also ensured that the scanning direction of the laser is the blade span direction and the minimum distance between the direction of the laser vector and the blade is the focal length.

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

[0035] Step 5: the blade disc rotates to feed; the blade disc rotates around the rotation center, and the feeding is along the laser vector direction, and when the laser feeds to the blade edge, the feeding is reversed to reciprocate.

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

[0037] Step 6: laser cleaning; start the laser to begin scanning, and under the motion state of step 5, the absorption layer begins to be layered and peeled off to reciprocate until the absorption layer on the surface to be cleaned is completely removed.

[0038] Step 7: surface cleaning; the surface is changed from the inlet surface 1 to the exhaust surface 2, which is realized by a mechanical hand and according to step 6 laser cleaning.

[0039] Step 8: flow channel cleaning; the flow channel 3 is located on the disc body and is located between the roots of two blades. The posture of the blade disc is adjusted to expose the flow channel to the laser irradiation range.

[0040] In the embodiment, the laser vector direction is controlled to be approximately the same as the blade span direction, and the distance from the flow channel to the light-emitting mirror is the focal length.

[0041] Step 9: supplementary cleaning. If there is absorption layer residue after cleaning, the posture of the blade disc is adjusted to remove the absorption layer residue by laser irradiation.

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

[0043] Step 10: part cleaning; the cleaning uses compressed air to remove the particles attached to the surface of the coating.

[0044] The above is only the preferred embodiment of the present application, and is not used to limit the patent protection range of the present application. For those skilled in the art, the present application can have various changes and variations. Any equivalent implementation or change without departing from the present application is included in the patent range of the present application.

Claims

1. A method for removing a plasma shock absorbing layer of a blade disk, characterized by: The steps include: Step 1: Clamping of blade disc parts is achieved 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. This is achieved 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 the process parameters. The laser cleaning process parameters include power, frequency, spot diameter, and scanning speed. Step 5: The blade disk rotates and feeds. The blade disk rotates around the center of rotation. The feed is along the laser vector direction. When the laser feed reaches the edge of the blade, it feeds in the reverse direction, and repeats this process. Step 6: Laser cleaning: Start the laser to scan. While the blade disc is rotating and feeding in step 5, the absorbent layer begins to peel off in layers. This process is repeated until the absorbent 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 by a robot. Laser cleaning is performed according to step 6. Step 8: Clean the flow channel. The flow channel is located on the blade body, between the roots of the two blades. Adjust the blade position 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 remaining after cleaning, adjust the blade disk posture so that the laser irradiates the remaining absorption layer to remove it; 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, when clamping, ensure that there is enough space for the blade disk to flip 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 scan method is used, the scanning direction is along the blade span direction, and the scanning length is controlled based on the blade length.

4. The method for removing the plasma shock absorbing 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 absorbing 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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