Abrasive flow machining system and method for blade disc of press machine

Abstract

The invention provides a press blade disc abrasive flow machining system and method, and belongs to the technical field of polishing machining.The press blade disc abrasive flow machining system is characterized in that a nozzle is arranged at the top of an operation cavity and comprises a containing cavity with an opening in the upper end, and a first circular spraying hole is formed in the center of the bottom wall of the containing cavity; a plurality of circles of second spraying holes with the first spraying hole as the circle center are formed around the first spraying hole, an arc-shaped guide face is arranged at the bottom of the inner hole wall of each second spraying hole, the inner arc faces of the arc-shaped guide faces of the second spraying holes located in the same circle point to the circle center of the first spraying hole, and the inner arc faces of the arc-shaped guide faces of the second spraying holes located in the same circle point to the circle center of the first spraying hole along with increasing of the linear distance between the second spraying holes and the first spraying hole. The inclination angle of the arc-shaped guide surface is gradually increased; the nozzle has the advantages that the nozzle adopts the structure that the first spray hole in the center is matched with the multiple circles of second spray holes, and the design of the arc-shaped guide surfaces at the bottoms of the second spray holes is combined, so that uniform dispersion and accurate spraying of abrasive particle flow can be realized, and uniform and consistent abrasive particle impact force can be obtained on each part of the surface of the blade disc.

Description

Technical Field

[0001] The invention belongs to the technical field of polishing processing, and in particular relates to an abrasive flow processing system and a processing method for a press blade disc. Background Art

[0002] Titanium alloy blade disks are key components of high-end equipment such as aircraft engines. Their surface quality and precision directly affect the performance and life of the engine. However, titanium alloys have the characteristics of high strength, high hardness, and low thermal conductivity, and are typical difficult-to-process materials. Traditional blade disk grinding methods, such as manual grinding and belt grinding, have problems such as low efficiency, poor consistency, and easy surface damage. They are difficult to meet the stringent requirements of modern aircraft engines for blade disk surface quality and processing efficiency.

[0003] As an emerging surface finishing technology, abrasive flow machining technology uses a viscoelastic fluid carrying abrasive particles to flow over the workpiece surface under pressure, and removes material through the micro-cutting action of abrasive particles. It has the advantages of high machining efficiency, good surface quality, and a wide range of applications. In recent years, abrasive flow machining technology has shown great application potential in the machining of complex curved surface parts such as aircraft engine blades and blisks. Therefore, designing an abrasive flow machining system and processing method for grinding and polishing titanium alloy blisks has become an urgent problem to be solved in the industry. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems in the prior art and to propose an abrasive flow machining system for polishing titanium alloy blades.

[0005] The object of the present invention can be achieved through the following technical solutions: A press blade abrasive flow processing system, comprising: A feed box, wherein abrasive is stored in the feed box; A grinding operation box, wherein a working chamber is provided in the grinding operation box, wherein the working chamber is used to place a blade disk, and a nozzle is provided at the top of the working chamber, wherein the nozzle comprises a receiving chamber with an opening at the upper end, wherein the receiving chamber is connected to the feed box through a feed pipe, and a circular first spray hole is provided at the center of the bottom wall of the receiving chamber, and a plurality of circles of second spray holes with the first spray hole as the center are provided around the first spray hole, wherein the second spray holes are all circular, and a plurality of the second spray holes in each circle are distributed at intervals, and an arc-shaped guide surface is provided at the bottom of the inner hole wall of each second spray hole, and the inner arc surfaces of the arc-shaped guide surfaces of the second spray holes on the same circle all point to the center of the first spray hole, and as the straight-line distance between the second spray hole and the first spray hole increases, the inclination angle of the arc-shaped guide surface gradually increases, and the bottom of the working chamber is connected to the feed box through a return pipe; A driving member, wherein the driving member comprises a driving shaft, wherein the driving shaft extends into the working cavity and is detachably connected to a blade disk in the working cavity, so as to realize synchronous rotation of the blade disk and the driving shaft.

[0006] In the above-mentioned abrasive flow machining system for a press blade disk, the first spray hole and the second spray hole are both integrally provided with a guide sleeve extending in a straight direction, and the guide sleeve is located in the accommodating cavity.

[0007] In the above-mentioned press blade abrasive flow machining system, the height of the guide sleeve is 10 mm.

[0008] In the above-mentioned press blade abrasive flow machining system, the number of the second spray holes in each circle differs from the number of the second spray holes in the adjacent outer circle by two, and the diameter of the second spray holes satisfies Formula I: D=0.003x²+0.167x+10 (I) In formula I, D is the diameter of the second nozzle hole, and x is the straight-line distance between the center of the second nozzle hole and the center of the first nozzle hole.

[0009] In the above-mentioned press blade disc abrasive flow machining system, the number of circles of the second spray holes is three, and the diameters of the second spray holes in each circle from the inside to the outside are 15 mm, 20 mm and 22 mm respectively.

[0010] The second object of the present invention is to provide a method for processing a compressor blade disc abrasive flow, using a press blade disc abrasive flow processing system, and the processing method specifically includes the following steps: S1. Pre-treating the titanium alloy workpiece and preparing a composite fluid abrasive; S2, start the driving circulation pump, set the circulation flow rate to 10-20L / min, and obtain a closed-loop flow path from the top injection port to the bottom reflux port; then start the rotary table, set the rotation speed to 10-20rpm, and set the temperature of the composite fluid abrasive obtained in step S1 to ≤50°C; S3, rough polishing: adjusting the inlet pressure of the abrasive flow processing system of the press blade to 1.0-1.2MPa, using the composite fluid abrasive prepared in step S2, under the conditions of 1.2MPa dynamic pressure and 15m / min linear flow rate, with 0.5mol / L hydrogen peroxide oxidation agent, so that a 5-8μm amorphous softened layer is formed on the surface of the titanium alloy, and the rough polishing time is 1-6h; S4, precision polishing: reduce the inlet pressure of the abrasive flow processing system of the press blade to 0.5-0.8MPa, use the composite fluid abrasive prepared in step S2, control the working pressure to 0.8MPa, the flow rate to 10m / min, monitor the material removal amount in real time through the laser displacement sensor, dynamically adjust the pressure fluctuation range to ≤±5%, and the precision polishing time is 4-16h; S5. Post-processing: After polishing is terminated, let it stand for 10 minutes to discharge the residual abrasive, and take out the workpiece for two-stage ultrasonic cleaning.

[0011] In the above-mentioned method for processing abrasive flow of a press blade disk, in step S1, the composite fluid abrasive includes the following components in percentage by mass: 8-12% matrix, 15-25% cubic silicon carbide, 8-12% hexagonal silicon carbide, 45-58% aluminum oxide, and 5-10% auxiliary agent.

[0012] In the above-mentioned method for processing abrasive flow of a press blade disk, the matrix is ​​silicone oil, and the viscosity is 900-1100 cSt.

[0013] In the above-mentioned method for processing abrasive flow of a press blade disk, the auxiliary agent is composed of a silane coupling agent, hydrogenated silicone oil, liquid paraffin and organic tin, and the mass ratio is 5:2:2:1.

[0014] Compared with the prior art, the composite fluid abrasive of the present invention adopts the above composition, and its function is: using cubic silicon carbide, hexagonal silicon carbide and aluminum oxide hard particles to provide high hardness and wear resistance, as well as good grinding effect and self-sharpening. In addition, the formula also includes silicone oil as a matrix to provide fluidity and viscoelasticity, hydrogen-containing silicone oil for improving the lubricity and wear resistance of the abrasive, organic tin as a catalyst to improve the stability of the abrasive, silane coupling agent for improving the bonding force between the abrasive particles and the matrix, and liquid paraffin for adjusting the viscosity and fluidity of the abrasive.

[0015] In the above-mentioned method for processing abrasive flow of a press blade disk, in step S1, the specific steps of pretreatment are as follows: ultrasonic degreasing with an alkaline cleaning agent for 30 minutes to remove surface oil stains, and then rinsing with deionized water.

[0016] In the above-mentioned press blade abrasive flow processing method, in step S5, the parameters of the two-stage ultrasonic cleaning are as follows: the frequency of the first-stage ultrasonic cleaning is 40 kHz, and the time is 15 minutes; the frequency of the second-stage ultrasonic cleaning is 80 kHz, and the time is 10 minutes.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the nozzle adopts a structure of a central first spray hole and a plurality of circles of second spray holes, and combined with the design of an arc-shaped guide surface at the bottom of the second spray hole, it can achieve uniform dispersion and precise injection of the abrasive flow, which is consistent with the structure of the blade disk, ensuring that all parts of the blade disk surface can obtain uniform and consistent abrasive impact force, thereby improving processing efficiency and surface quality; the bottom of the working chamber is connected to the feed box through a return pipe, thereby realizing the recycling of abrasives, reducing production costs, and reducing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structural composition of the processing system; Figure 2 It is one of the three-dimensional structural diagrams of the nozzle; Figure 3 This is the second schematic diagram of the three-dimensional structure of the nozzle; Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure.

[0019] In the figure, there are a feed box 100 , a grinding operation box 101 , an operation chamber 102 , a nozzle 103 , a receiving chamber 104 , a first spray hole 105 , a second spray hole 106 , a driving member 107 , an arc-shaped guide surface 108 , a guide sleeve 109 , and a blade disk 200 . DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] like Figure 1-Figure 4 As shown, a press blade abrasive flow machining system comprises: A feed box 100, wherein abrasive is stored in the feed box 100; A grinding operation box 101 is provided with an operation chamber 102 in the grinding operation box 101. The operation chamber 102 is used to place the blade disc 200. A nozzle 103 is provided at the top of the operation chamber 102. The nozzle 103 includes a receiving chamber 104 with an opening at the upper end. The receiving chamber 104 is connected to the feed box 100 through a feed pipe. A circular first spray hole 105 is provided at the center of the bottom wall of the receiving chamber 104. A plurality of circles of second spray holes 106 are provided around the first spray hole 105 with the first spray hole 105 as the center. The spray holes 106 are all circular, and the multiple second spray holes 106 in each circle are distributed at intervals. The bottom of the inner hole wall of each second spray hole 106 is provided with an arc-shaped guide surface 108. The inner arc surface of the arc-shaped guide surface 108 of the second spray holes 106 located in the same circle points to the center of the first spray hole 105. As the straight-line distance between the second spray hole 106 and the first spray hole 105 increases, the inclination angle of the arc-shaped guide surface 108 gradually increases. The bottom of the working chamber 102 is connected to the feed box 100 through a return pipe. The driving member 107 includes a driving shaft, which extends into the working chamber 102 and is detachably connected to the blade disk 200 in the working chamber 102 to achieve synchronous rotation of the blade disk 200 and the driving shaft.

[0023] In this embodiment, the nozzle 103 adopts a structure of a central first spray hole 105 and a plurality of circles of second spray holes 106, and combined with the design of an arc-shaped guide surface 108 at the bottom of the second spray hole 106, it can achieve uniform dispersion and precise injection of the abrasive flow, which is consistent with the structure of the blade disk 200, ensuring that all parts of the surface of the blade disk 200 can obtain uniform and consistent abrasive impact force, thereby improving processing efficiency and surface quality; the bottom of the working chamber 102 is connected to the feed box 100 through a return pipe, thereby realizing the recycling of abrasives, reducing production costs, and reducing environmental pollution.

[0024] It is worth mentioning that the inclination angle of the arc-shaped guide surface 108 refers to the acute angle between the tangent of the arc-shaped guide surface 108 and the central axis of the corresponding second spray hole 106; a diaphragm pump is provided on the feeding pipe to ensure that the pressure of the abrasive is above 1 MPa.

[0025] Further preferably, a guide sleeve 109 extending in a straight direction is integrally provided on the first spray hole 105 and the second spray hole 106 , and the guide sleeve 109 is located in the accommodating cavity 104 .

[0026] In this embodiment, the guide sleeve 109 can guide the abrasive to spray in the vertical direction, reduce the diffusion and scattering of the abrasive during the spraying process, increase the concentration and impact force of the abrasive flow, and thus improve the processing efficiency; at the same time, the existence of the guide sleeve 109 can also protect the inner walls of the first spray hole 105 and the second spray hole 106, reduce the direct impact and wear of the abrasive on the spray hole, and extend the service life of the nozzle 103.

[0027] It is worth mentioning that the height of the guide sleeve 109 is 10 mm. At this height, the guide sleeve 109 can effectively control the inflow direction of the abrasive, guide the abrasive flow to spray along a predetermined trajectory, avoid turbulence and eddy currents of the liquid in the accommodating chamber 104, and improve the concentration and impact force of the abrasive flow; the height difference space formed between the bottom wall of the accommodating chamber 104 and the guide sleeve 109 can promote the flow of the abrasive, form a certain eddy effect, improve the rectification effect, and make the abrasive flow more uniform and stable.

[0028] Specifically, the number of the second spray holes 106 in each circle differs from the number of the second spray holes 106 in the adjacent outer circle by two, and the diameter of the second spray holes 106 satisfies Formula I: D=0.003x²+0.167x+10 (I) In Formula I, D is the diameter of the second spray hole 106 , and x is the straight-line distance between the center of the second spray hole 106 and the center of the first spray hole 105 .

[0029] The following is further described in the form of embodiments.

[0030] It is worth mentioning that in Examples 1 to 7, the inventors only changed the parameters of the abrasive flow machining system of the press blade, and the specific steps of the machining method used were the same, as follows: Step 1, pretreatment and polishing liquid preparation: pretreat the surface of the titanium alloy workpiece, use an alkaline cleaning agent to ultrasonically degrease for 30 minutes to remove surface oil stains, rinse with deionized water and fix it in a multi-degree-of-freedom vacuum fixture, weigh 12% matrix, 20% cubic silicon carbide, 10% hexagonal silicon carbide, 50% aluminum oxide, and 8% auxiliary agent by mass percentage, wherein the matrix is ​​silicone oil with a viscosity of 1000 cSt; the auxiliary agent is composed of a silane coupling agent, hydrogen-containing silicone oil, liquid paraffin and organic tin, and the mass ratio is 5:2:2:1; add the above raw materials into deionized water and ultrasonically disperse at a power of 200 W for 30 minutes to obtain a composite fluid abrasive; Step 2, initialization of the circulation system: start the driving circulation pump, set the circulation flow rate to 15 L / min, form a closed-loop flow path from the top injection port to the bottom return port, start the rotary table, set the speed to 15 rpm, generate a centrifugal field to enhance the uniformity of abrasive distribution, and simultaneously start the constant temperature module to maintain the temperature of the composite fluid abrasive ≤ 50 °C through the built-in copper tube cooler; Step 3, rough polishing: adjust the inlet pressure of the abrasive flow processing system of the press blade to 1.1MPa, maintain the normal pressure environment at the outlet, and use 0.5mol / L hydrogen peroxide oxidation agent under the conditions of 1.2MPa dynamic pressure and 15m / min linear flow rate to form an amorphous softening layer on the surface, and the rough polishing time is 3h; Step 4, precision polishing: reduce the inlet pressure of the abrasive flow machining system of the press blade to 0.6MPa, control the working pressure to 0.8MPa and the flow rate to 10m / min, monitor the material removal amount in real time through the laser displacement sensor, dynamically adjust the pressure fluctuation range to ≤±5%, and the precision polishing time to 10h; Step 5, post-processing: After polishing is terminated, let it stand for 10 minutes to discharge the residual abrasive, and take out the workpiece for two-stage ultrasonic cleaning (40kHz / 15min + 80kHz / 10min).

[0031] Example 1

[0032] In this embodiment, according to Formula I, the straight-line distance between the center of the second spray hole 106 and the center of the first spray hole 105 and the diameter of the second spray hole 106 are designed to meet Table 1.

[0033] Table 1: Design parameter table of Example 1

[0034] In this embodiment, the diameter of the first spray hole 105 is 10 mm, the height of the guide sleeve 109 is 2 mm, and finally a polished blade disk 200 is obtained.

[0035] Example 2

[0036] In this embodiment, according to Formula I, the straight-line distance between the center of the second spray hole 106 and the center of the first spray hole 105 and the diameter of the second spray hole 106 are designed to meet Table 2.

[0037] Table 2: Design parameter table of Example 2

[0038] In this embodiment, the diameter of the first spray hole 105 is 10 mm, the height of the guide sleeve 109 is 5 mm, and finally a polished blade disk 200 is obtained.

[0039] Example 3

[0040] In this embodiment, according to Formula I, the straight-line distance between the center of the second spray hole 106 and the center of the first spray hole 105 and the diameter of the second spray hole 106 are designed to meet Table 3.

[0041] Table 3: Design parameter table of Example 3

[0042] In this embodiment, the diameter of the first spray hole 105 is 10 mm, the height of the guide sleeve 109 is 10 mm, and finally a polished blade disk 200 is obtained.

[0043] Example 4

[0044] In this embodiment, according to Formula I, the straight-line distance between the center of the second spray hole 106 and the center of the first spray hole 105 and the diameter of the second spray hole 106 are designed to meet Table 4.

[0045] Table 4: Design parameter table of Example 4

[0046] In this embodiment, the diameter of the first spray hole 105 is 10 mm, the height of the guide sleeve 109 is 15 mm, and finally a polished blade disk 200 is obtained.

[0047] Example 5

[0048] In this embodiment, according to Formula I, the straight-line distance between the center of the second spray hole 106 and the center of the first spray hole 105 and the diameter of the second spray hole 106 are designed to meet Table 5.

[0049] Table 5: Design parameter table of Example 5

[0050] In this embodiment, the diameter of the first spray hole 105 is 6 mm, the height of the guide sleeve 109 is 10 mm, and finally a polished blade disk 200 is obtained.

[0051] Example 6

[0052] In this embodiment, according to Formula I, the straight-line distance between the center of the second spray hole 106 and the center of the first spray hole 105 and the diameter of the second spray hole 106 are designed to meet Table 6.

[0053] Table 6: Design parameter table of Example 6

[0054] In this embodiment, the diameter of the first spray hole 105 is 10 mm, the height of the guide sleeve 109 is 10 mm, and finally a polished blade disk 200 is obtained.

[0055] The inventors conducted roughness tests on the blisks 200 of Examples 1 to 6 that had been polished. The test results are shown in Table 7: Table 7: Roughness test results of the blade disks of Examples 1 to 6

[0056] It can be seen from the above results that the diameters of the first spray hole 105 and the second spray hole 106, and the height of the guide sleeve 109 have a certain influence on the roughness of the final product, and when the diameter of the first spray hole 105 is 10 mm; the diameters of each circle of the second spray holes 106 from the inside to the outside are 15 mm, 20 mm and 22 mm respectively; and the height of the guide sleeve 109 is 10 mm, that is, when the data of Example 3 are selected, the performance of the obtained product is the best.

[0057] It is worth mentioning that the inclination angle of the arc-shaped guide surface of the second spray hole 106 satisfies formula (II): y = 0.0002235x 3 - 0.03328x 2 + 1.7115x (II) In formula II, x is the straight-line distance from the outermost edge of the second spray hole 106 to the center of the nozzle 103 , and y is the inclination angle of the arc-shaped guide surface 108 .

[0058] In Examples 7 to 10, the press blade abrasive flow machining system of Example 3 was used, and only the parameters in the machining method were changed.

[0059] Example 7

[0060] This embodiment provides a method for processing a compressor blade disc abrasive flow, using the press blade disc abrasive flow processing system of embodiment 3, and the processing method specifically includes the following steps: Step 1, pretreatment and polishing liquid preparation: pretreat the surface of the titanium alloy workpiece, use an alkaline cleaning agent to ultrasonically degrease for 30 minutes to remove surface oil stains, rinse with deionized water and fix it in a multi-degree-of-freedom vacuum fixture, weigh 12% matrix, 20% cubic silicon carbide, 10% hexagonal silicon carbide, 50% aluminum oxide, and 8% auxiliary agent by mass percentage, wherein the matrix is ​​silicone oil with a viscosity of 1000 cSt; the auxiliary agent is composed of a silane coupling agent, hydrogen-containing silicone oil, liquid paraffin and organic tin, and the mass ratio is 5:2:2:1; add the above raw materials into deionized water and ultrasonically disperse at a power of 200 W for 30 minutes to obtain a composite fluid abrasive; Step 2, initialization of the circulation system: start the driving circulation pump, set the circulation flow rate to 15 L / min, form a closed-loop flow path from the top injection port to the bottom return port, start the rotary table, set the speed to 15 rpm, generate a centrifugal field to enhance the uniformity of abrasive distribution, and simultaneously start the constant temperature module to maintain the temperature of the composite fluid abrasive ≤ 50 °C through the built-in copper tube cooler; Step 3, rough polishing: adjust the inlet pressure of the abrasive flow processing system of the press blade to 1.1MPa, maintain the normal pressure environment at the outlet, and use 0.5mol / L hydrogen peroxide oxidation agent under the conditions of 1.2MPa dynamic pressure and 15m / min linear flow rate to form an amorphous softening layer on the surface, and the rough polishing time is 3h; Step 4, precision polishing: reduce the inlet pressure of the abrasive flow machining system of the press blade to 0.6MPa, control the working pressure to 0.8MPa and the flow rate to 10m / min, monitor the material removal amount in real time through the laser displacement sensor, dynamically adjust the pressure fluctuation range to ≤±5%, and the precision polishing time to 10h; Step 5, post-processing: After polishing is terminated, let it stand for 10 minutes to discharge the residual abrasive, and take out the workpiece for two-stage ultrasonic cleaning (40kHz / 15min + 80kHz / 10min).

[0061] Example 8

[0062] This embodiment provides a method for processing a compressor blade disc abrasive flow, using the press blade disc abrasive flow processing system of embodiment 3, and the processing method specifically includes the following steps: Step 1, pretreatment and polishing liquid preparation: pretreat the surface of the titanium alloy workpiece, use an alkaline cleaning agent to ultrasonically degrease for 30 minutes to remove surface oil stains, rinse with deionized water and fix it in a multi-degree-of-freedom vacuum fixture, weigh 12% matrix, 22% cubic silicon carbide, 8% hexagonal silicon carbide, 50% aluminum oxide, and 8% auxiliary agent by mass percentage, wherein the matrix is ​​silicone oil with a viscosity of 1100 cSt; the auxiliary agent is composed of a silane coupling agent, hydrogen-containing silicone oil, liquid paraffin and organic tin, and the mass ratio is 5:2:2:1; add the above raw materials into deionized water and ultrasonically disperse at a power of 200 W for 30 minutes to obtain a composite fluid abrasive; Step 2, initialization of the circulation system: start the driving circulation pump, set the circulation flow rate to 20L / min, form a closed-loop flow path from the top injection port to the bottom return port, start the rotary table, set the speed to 20rpm, generate a centrifugal field to enhance the uniformity of abrasive distribution, and simultaneously start the constant temperature module to maintain the temperature of the composite fluid abrasive ≤50℃ through the built-in copper tube cooler; Step 3, rough polishing: adjust the inlet pressure of the abrasive flow processing system of the press blade to 1.2MPa, maintain the normal pressure environment at the outlet, and use 0.5mol / L hydrogen peroxide oxidation agent under the conditions of 1.2MPa dynamic pressure and 15m / min linear flow rate to form an amorphous softening layer on the surface. The rough polishing time is 6h; Step 4, precision polishing: reduce the inlet pressure of the abrasive flow machining system of the press blade to 0.8MPa, control the working pressure to 0.8MPa and the flow rate to 10m / min, monitor the material removal amount in real time through the laser displacement sensor, dynamically adjust the pressure fluctuation range to ≤±5%, and the precision polishing time to 16h; Step 5, post-processing: After polishing is terminated, let it stand for 10 minutes to discharge the residual abrasive, and take out the workpiece for two-stage ultrasonic cleaning (40kHz / 15min + 80kHz / 10min).

[0063] Example 9

[0064] The only difference from Example 7 is that the preparation steps of the composite fluid abrasive in this embodiment are as follows: 12% of the matrix, 30% of cubic silicon carbide, 50% of aluminum oxide, and 8% of the auxiliary agent are weighed by mass percentage, wherein the matrix is ​​silicone oil with a viscosity of 1000 cSt; the auxiliary agent is composed of a silane coupling agent, hydrogenated silicone oil, liquid paraffin and organic tin, and the mass ratio is 5:2:2:1; the above raw materials are added to deionized water and ultrasonically dispersed at a power of 200 W for 30 minutes; the rest is the same as Example 7 and will not be repeated here.

[0065] Example 10

[0066] The only difference from Example 7 is that the preparation steps of the composite fluid abrasive in this embodiment are as follows: 12% of the matrix, 30% of hexagonal silicon carbide, 50% of aluminum oxide, and 8% of the auxiliary agent are weighed by mass percentage, wherein the matrix is ​​silicone oil with a viscosity of 1000 cSt; the auxiliary agent is composed of a silane coupling agent, hydrogenated silicone oil, liquid paraffin and organic tin, and the mass ratio is 5:2:2:1; the above raw materials are added to deionized water and ultrasonically dispersed at a power of 200 W for 30 minutes; the rest is the same as Example 7 and will not be repeated here.

[0067] The polished blade disks 200 of Examples 7 to 10 were tested again for roughness. The test results are shown in Table 8: Table 8: Roughness test results of the blade disks of Examples 7 to 10

[0068] It can be seen from the above results that the composite fluid abrasive of the present invention adopts the above composition, and its function is to provide high hardness and wear resistance, as well as good grinding effect and self-sharpening property by utilizing cubic silicon carbide, hexagonal silicon carbide and aluminum oxide hard particles.

[0069] It should be noted that in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0070] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0071] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A press blade abrasive flow machining system, characterized in that: include: A feed box, wherein abrasive is stored in the feed box; A grinding operation box, wherein a working chamber is provided in the grinding operation box, wherein the working chamber is used to place a blade disk, and a nozzle is provided at the top of the working chamber, wherein the nozzle comprises a receiving chamber with an opening at the upper end, wherein the receiving chamber is connected to the feed box through a feed pipe, and a circular first spray hole is provided at the center of the bottom wall of the receiving chamber, and a plurality of circles of second spray holes with the first spray hole as the center are provided around the first spray hole, wherein the second spray holes are all circular, and a plurality of the second spray holes in each circle are distributed at intervals, and an arc-shaped guide surface is provided at the bottom of the inner hole wall of each second spray hole, and the inner arc surfaces of the arc-shaped guide surfaces of the second spray holes on the same circle all point to the center of the first spray hole, and as the straight-line distance between the second spray hole and the first spray hole increases, the inclination angle of the arc-shaped guide surface gradually increases, and the bottom of the working chamber is connected to the feed box through a return pipe; A driving member, wherein the driving member comprises a driving shaft, wherein the driving shaft extends into the working cavity and is detachably connected to a blade disk in the working cavity, so as to realize synchronous rotation of the blade disk and the driving shaft.

2. The abrasive flow machining system for a press blade according to claim 1, characterized in that: The first spray hole and the second spray hole are both integrally provided with a flow guide sleeve extending in a straight direction, and the flow guide sleeve is located in the accommodating cavity.

3. A press blade abrasive flow machining system according to claim 2, characterized in that: The height of the guide sleeve is 10 mm.

4. The abrasive flow machining system for a press blade according to claim 1, characterized in that: The number of the second spray holes in each circle differs from that of the second spray holes in the adjacent outer circle by two, and the diameter of the second spray holes satisfies Formula I: D=0.003x²+0.167x+10 (I) In formula I, D is the diameter of the second nozzle hole, and x is the straight-line distance between the center of the second nozzle hole and the center of the first nozzle hole.

5. The abrasive flow machining system for a press blade according to claim 1, characterized in that: The number of circles of the second spray holes is three, and the diameters of the second spray holes in each circle from the inside to the outside are 15 mm, 20 mm and 22 mm respectively.

6. A method for processing abrasive flow of a compressor blade, characterized in that: The press blade abrasive flow machining system according to any one of claims 1 to 5 is adopted, and the machining method specifically comprises the following steps: S1. Pre-treating the titanium alloy workpiece and preparing a composite fluid abrasive; S2, start the driving circulation pump, set the circulation flow rate to 10-20L / min, and obtain a closed-loop flow path from the top injection port to the bottom reflux port; then start the rotary table, set the rotation speed to 10-20rpm, and set the temperature of the composite fluid abrasive obtained in step S1 to ≤50°C; S3, rough polishing: adjusting the inlet pressure of the abrasive flow processing system of the press blade to 1.0-1.2MPa, using the composite fluid abrasive prepared in step S2, under the conditions of 1.2MPa dynamic pressure and 15m / min linear flow rate, with 0.5mol / L hydrogen peroxide oxidation agent, so that a 5-8μm amorphous softened layer is formed on the surface of the titanium alloy, and the rough polishing time is 1-6h; S4, precision polishing: reduce the inlet pressure of the abrasive flow processing system of the press blade to 0.5-0.8MPa, use the composite fluid abrasive prepared in step S2, control the working pressure to 0.8MPa, the flow rate to 10m / min, monitor the material removal amount in real time through the laser displacement sensor, dynamically adjust the pressure fluctuation range to ≤±5%, and the precision polishing time is 4-16h; S5. Post-processing: After polishing is terminated, let it stand for 10 minutes to discharge the residual abrasive, and take out the workpiece for two-stage ultrasonic cleaning.

7. The processing method according to claim 6, characterized in that: In the step S1, the composite fluid abrasive includes the following components in percentage by mass: 8-12% matrix, 15-25% cubic silicon carbide, 8-12% hexagonal silicon carbide, 45-58% aluminum oxide, and 5-10% auxiliary agent.

8. The processing method according to claim 7, characterized in that: The matrix is ​​silicone oil, and the viscosity is 900-1100 cSt; And / or, the auxiliary agent consists of a silane coupling agent, hydrogen-containing silicone oil, liquid paraffin and organic tin, and the mass ratio is 5:2:2:

1.

9. The processing method according to claim 6, characterized in that: In step S1, the specific steps of pretreatment are as follows: ultrasonic degreasing with an alkaline detergent for 30 minutes to remove surface oil stains, and then rinsing with deionized water.

10. The processing method according to claim 6, characterized in that: In step S5, the parameters of the two-stage ultrasonic cleaning are as follows: the frequency of the first-stage ultrasonic cleaning is 40 kHz, and the time is 15 minutes; the frequency of the second-stage ultrasonic cleaning is 80 kHz, and the time is 10 minutes.

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